Subject ASC0003twg
The geological magazine, or, Monthly journal of geology.
n.s. decade 4, v. 2 (1895), Page 398 (1895)
Smithsonian Libraries
BHL Page 30555318
Keywords
shells Stephanoceras Stephanoceras coronatum stephanoceras blagdeni inferior oolite callovian fossils geology haploceratidae middle chalk shell pachydiscus peramplus ligati harpoceratidae desmoceras ligatum fossil oolite d'orb ammonite