Subject ASC0003tf2
The geological magazine, or, Monthly journal of geology.
Decade 3:v. 5 (1888), Page 487 (1888)
Smithsonian Libraries
BHL Page 30533987
Keywords
Actinocerus Bigsbyi Thessalon Island Lake Huron endosiphon fossil Versailles Kentucky cephalopods Actinoceras bigsbyi shell structure morphology spine Mollusk Actinoceras Central Europe South-west Europe fragment siphunele septal chambers Belgium Spain Sardinia Montagene Noire France cambrian system