Keywords: Conchological Manual Figs 01-03.png 1 Egg of a Bulinus 2 The same broken shewing the young shell 3 The young of a Paludina as seen in the aperture of the shell gutenberg A Conchological Manual 43417 1842 George Brettingham Sowerby II 1812 “1884 PD-old-100 A conchological manual 1842 |