Fossils sketched and categorized by Heinrich Bronn for his book Lethäa Geognostica (1837).
Ernst Mayr Library, Harvard University Museum of Comparative Zoology/Internet Archive
Fossils sketched and categorized by Heinrich Bronn for his book Lethäa Geognostica (1837).
Ernst Mayr Library, Harvard University Museum of Comparative Zoology/Internet Archive