PLATE XL 



Cucull^a (continued). 



FIGS. 



1, 2. C. (Dicranodonta) donningtonensis, Keeping. Claxby Ironstone (zone 

 of Belemnites lateralis), Benniworth Haven. Woodwardian 

 Museum. (P. 54.) 



1. a, left valve ; b, interior. 



2. Eight valve. 



3, 4. C. (Dicranodonta ?) obliqua (Keeping). Lower Greensand, Upware. 

 Woodwardian Museum. (P. 55.) 



3. a, right valve, outline ; b, same X H ; c, dorsal. 



4. Left valve, interior. 



5 — 7. C. venusta, Nyst. Greensand, Blackclown. (P. 56.) 



5. The Type, Bristol Museum. Left valve, a, dorsal outline; b, outline; c, same 

 x 2. 



0. The Type, Bristol Museum. Left valve, a, outline ; b, same X 2. 



7. Collection of C. J. A, Meyer, a, right valve x 3 (the outer layers of the shell 

 are absent, so that the apparent ornamentation differs from that in figs. 5 and 6) ; 

 b, dorsal view of same X 3. 



5 — 12. C. glabra, Parkinson. Greensand, Blackdown. (P. 57.) 



8. British Museum, No. 2G926. a, left valve ; b, dorsal of same specimen ; c, orna- 

 mentation x 6. 



9. Wiltshire Collection, Woodwardian Museum, a, left valve; b, dorsal view. 



10. Woodwardian Museum. Hinge of the left valve of a young form x 4. 



11. Wiltshire Collection, Woodwardian Museum. Hinge of right valve — later stage 

 than fig. 10— x 2. 



12. Woodwardian Museum. Hinge of right valve x 1£. 



