Subject ASC0003sjs
The geological magazine, or, Monthly journal of geology.
[Decade 1]:v. 10 (1873), Page 152 (1873)
Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
BHL Page 32527579
Keywords
pteraspis Kneri scaphaspis cyathaspis Fr. Schmidt Dniester Zalesczyki Podolia Galizia coccosteus heterostracous cephalaspidae dorsal ventral shield shields Genera of Heterostracous cephalaspid seaphaspis pteraspis Magister Fr. Schmidt extinct fish jawless fish Osteostraci Scaphaspis Cyathaspis Pteraspis Pteraspis Kneri fossils