$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f1.ps} \end{figure}$

Figure 1: TOP: NGC 23 and the environments of SN 1955C. BOTTOM: NGC 210 and the environments of SN 1954R. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f2.ps}\end{figure}$

Figure 2: TOP: NGC 224 and the environments of SN 1885A. BOTTOM: NGC 253 and the environments of SN 1940E. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f3.ps}\end{figure}$

Figure 3: TOP: NGC 488 and the environments of SN 1978G. BOTTOM: UGC 2069 and the environments of SN 1961P. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f4.ps}\end{figure}$

Figure 4: TOP: UGC 2105 and the environments of SN 1938A. BOTTOM: NGC 1003 and the environments of SN 1937D. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f5.ps}\end{figure}$

Figure 5: TOP: NGC 1058 and the environments of SN 1961V. BOTTOM: NGC 1058 and the environments of SN 1969L. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f6.ps}\end{figure}$

Figure 6: TOP: NGC 1073 and the environments of SN 1962L. BOTTOM: UGC 2259 and the environments of SN 1963L. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f7.ps}\end{figure}$

Figure 7: TOP: NGC 1325 and the environments of SN 1975S. BOTTOM: NGC 2276 and the environments of SN 1962Q. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f8.ps}\end{figure}$

Figure 8: TOP: NGC 2276 and the environments of SN 1968V. BOTTOM: NGC 2276 and the environments of SN 1968W. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f9.ps}\end{figure}$

Figure 9: TOP: NGC 6946 and the environments of SN 1917A. BOTTOM: NGC 6946 and the environments of SN 1939C. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f10.ps}\end{figure}$

Figure 10: TOP: NGC 6946 and the environments of SN 1948B. BOTTOM: NGC 6946 and the environments of SN 1968D. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f11.ps}\end{figure}$

Figure 11: TOP: NGC 6946 and the environments of SN 1969P. BOTTOM: NGC 6946 and the environments of SN 1980K. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f12.ps}\end{figure}$

Figure 12: TOP: NGC 7177 and the environments of SN 1960L. BOTTOM: NGC 7177 and the environments of SN 1976E. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f13.ps} \end{figure}$

Figure 13: TOP: NGC 7331 and the environments of SN 1959D. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f14.ps}\end{figure}$

Figure 14: TOP: NGC 2935 and the environments of SN 1975F. BOTTOM: NGC 3115 and the environments of SN 1935B. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f15.ps}\end{figure}$

Figure 15: TOP: NGC 3627 and the environments of SN 1973R. BOTTOM: NGC 3627 and the environments of SN 1989B. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f16.ps}\end{figure}$

Figure 16: TOP: NGC 4038 and the environments of SN 1921A. BOTTOM: NGC 4038 and the environments of SN 1974E. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f17.ps}\end{figure}$

Figure 17: TOP: NGC 4254 and the environments of SN 1967H. BOTTOM: NGC 4254 and the environments of SN 1972Q. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f18.ps}\end{figure}$

Figure 18: TOP: NGC 4254 and the environments of SN 1986I. BOTTOM: NGC 4303 and the environments of SN 1926A. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f19.ps}\end{figure}$

Figure 19: TOP: NGC 4303 and the environments of SN 1961I. BOTTOM: NGC 4303 and the environments of SN 1964F. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f20.ps}\end{figure}$

Figure 20: TOP: NGC 4321 (M100) and the environments of SN 1901B. BOTTOM: NGC 4321 and the environments of SN 1914A. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f21.ps}\end{figure}$

Figure 21: TOP: NGC 4321 and the environments of SN 1959E. BOTTOM: NGC 4321 and the environments of SN 1979C. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f22.ps}\end{figure}$

Figure 22: TOP: NGC 4382 and the environments of SN 1960R. BOTTOM: NGC 4424 (May) and the environments of SN 1895A. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f23.ps}\end{figure}$

Figure 23: TOP: NGC 4424 (March) and the environments of SN 1895A. BOTTOM: NGC 4674 and the environments of SN 1907A. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f24.ps}\end{figure}$

Figure 24: TOP: NGC 4753 (May) and the environments of SN 1965I. BOTTOM: NGC 4753 (May) and the environments of SN 1983G. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f25.ps}\end{figure}$

Figure 25: TOP: NGC 4753 (March) and the environments of SN 1965I. BOTTOM: NGC 4753 (March) and the environments of SN 1983G. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f26.ps}\end{figure}$

Figure 26: TOP: IC 4237 and the environments of SN 1962H. BOTTOM: NGC 5236 (M83) and the environments of SN 1923A. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f27.ps}\end{figure}$

Figure 27: TOP: NGC 5236 and the environments of SN 1950B. BOTTOM: NGC 5236 and the environments of SN 1957D. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f28.ps}\end{figure}$

Figure 28: TOP: NGC 5236 and the environments of SN 1968L. BOTTOM: NGC 5236 and the environments of SN 1983N. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f29.ps}\end{figure}$

Figure 29: TOP: NGC 5253 and the environments of SN 1895B. BOTTOM: NGC 5253 and the environments of SN 1972E. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f30.ps}\end{figure}$

Figure 30: TOP: NGC 5668 (May) and the environments of SN 1952G. BOTTOM: NGC 5668 (May) and the environments of SN 1954B. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f31.ps}\end{figure}$

Figure 31: TOP: NGC 5668 (March) and the environments of SN 1952G. BOTTOM: NGC 5668 (March) and the environments of SN 1954B. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f32.ps}\end{figure}$

Figure 32: TOP: NGC 5857 and the environments of SN 1950H. BOTTOM: NGC 5857 and the environments of SN 1955M. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f33.ps}\end{figure}$

Figure 33: TOP: NGC 5861 and the environments of SN 1971D. BOTTOM: NGC 6181 and the environments of SN 1916B. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f34.ps}\end{figure}$

Figure 34: TOP: NGC 6384 and the environments of SN 1971L. BOTTOM: IC 4719 and the environments of SN 1934A. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f35.ps}\end{figure}$

Figure 35: TOP: IC 4798 and the environments of SN 1971R. BOTTOM: NGC 6835 and the environments of SN 1962J. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

$\begin{figure} \includegraphics [height=20cm, angle=-90]{ds8769f36.ps}\end{figure}$

Figure 36: TOP: NGC 7177 and the environments of SN 1960L. BOTTOM: NGC 7177 and the environments of SN 1976E. Each environment is taken as a 30 arcsec side box centered at the SN position. The ring is 5 arcsec in radius. See text for details

6 Figures in electronic form only