Subject ASC0003tg5
The geological magazine, or, Monthly journal of geology.
Decade 3:v. 8 (1891), Page 117 (1891)
Smithsonian Libraries
BHL Page 30545483
Keywords
Echinoconus subrotundatus tapeworm apical disc lower chalk shudy camps anti ambulacrum madreporite plate anal interradius fossil lower chalk echinoid biology apical disc madreporite plate anal interradius morphology echinoderms