PLATE 61. 
Fig. 1. 653. 1. Gomphoceras? ( Pag. 290.) 
1 a. A young individual much compressed, in the shale. 
lb. A larger individual from the limestone. 
Fig. 2. 654. 8. Cyrtoceras? cancellatum. ( Pag. 290.) 
2 a. A fragment in shale, which is entirely compressed. The shell is retained on the larger part of the sur¬ 
face, and, where exfoliated, the surface is marked by longitudinal striae . 
2 b. A fragment of a similarly marked specimen from limestone. 
2 c. Section of the same, showing the dorsal position of the siphuncle. 
Fig. 3. 
655. 32. 
Qrthoceras - (Species undetermined). 
(Pag. 
291.) 
Fig. 4. 
656. 33. 
Orthoceras imbricatum? 
( Pa S- 
291.) 
4 a, b, c. Fragments of small individuals of this species. 
