PLATE XXXIV. 



GYiiOPLEUUA {cmilmued). 

 Figs. 



]. 6'. sp. U])pcr Chalk (zone of J.c^i?;ocflmrta; 2>iejms), Seafonl. ]\lr. F. 1{. H. 

 Williams' CoUoction. a, left valve and innboiial part of right valve ; 

 /', i)osterior view of both valves ; c, ornamentation of left valve X 3 ; 

 (/, ornamentation of right valve X 3. (P. 210.) 



Genus — Cuurui.A, UriK/aiere. 



2 — 5. C. (?;/;/;//('/(; (Phill.). Speeton Clay, Speeton. 2, 5, Sedgwick Museum; 

 3, 4, Mr. Lamplugh's Collection. (P. 210.) 



2 a, left valve ; b, dorsal view of both valves ; c, anterior view, x 5. 

 3, 4. Left valves x 5. 

 5. Eight valve x 5. 



G — 12. C. stfiatula, Sow. Lower Greensand (Atherfield Beds), East Slullford ; 

 except 7 and 12, from the Crackers, Atherfield. Sedgwick Museum. 

 X 5. (P. 212.) 



G — lU. Eiy;ht valves. '.) i, dorsal view of 'J a. 

 11a, left valve ; h, dorsal view of both valves. 

 12. Anterior view of both valves. 



13. G. sp. Lower Greensand, Puufield. Museum of Practical Geology, 

 No. 22723. Right valve, the posterior part broken, X 5. (P. 213.) 



14—10. C. yft«Z//««, Pict. and Camp. Gault, Folkestone. X 5. (P. 214.) 



14. Sedijwick Museum, d, riy;ht valve ; ?i, dorsal view of both valves; c, anterior 

 view. 

 15, ll). Museum of Practical Geology, Nos. 22727, 22728. Left valves. 



17 — 22. 0. fruiu'iitd, Sow. Upper Greensand, Blackdown. Sedgwick Museum. 

 X 5. (P. 215.) 



17 — ly. Eight valves. 

 20, 21. Left valves. 20 fc, dorsal view of 20.;. 



22a, posterior view of left valve x 5; //, oruaiiieiitatiou near the middle of the 

 veutral margin x 10. 



23 — 28. G. eh'tjtinx, Sow. LTpper Greensand, Blackdown. Sedgwick Museum. 

 X 5. (P. 2I().) 



23—26. Eight valves. 



27. Anterior view of lx)th valves. 



28a, left valve and imibo of right valve; b, dorsal view of a. 



