Subject ASC0001gq2
The Quarterly journal of the Geological Society of London.
v.10 (1854), Page 25 (1854)
Smithsonian Libraries
BHL Page 35013494
Keywords
Shell Fossil Phragmoceras callistoma phragmoceras fossil Phragmoceras Loveni Phragmoceras Ascoceras sp Ascoceras Cephalopod Barrande outline traverse section the body-chamber the air-chambers place of the siphuncle cephalopod shell characteristics mouth aperture