PLATE XXXII. 

 Protocardta (continued). 



Fios. 



1 — n. r. Jlillnua (Sow.). Fpper Grccnsnnd, Blackdnwn. Sodijwick Miisonm, 

 Caml)riage. (P. Iii7.) 



1. Left valve. 



2, 3. Right valves. 



4. Interior of loft valve. 



r>. Hinge of riglit valve. 



6. Dorsal view of both valves. 



Genus — Car Di r m , Linnasus. 



7 — 10. C. llilii'houi , Foi'bos. Lower Greensaiul (Crackers), Atlierfiekl. Sedg- 

 wick Museum, Cambridge. (P. 20L) 



7'», right valve; h, dor.-ial view of huth valvea ; r, po.sterior view; </, aiit<>rior 

 view; (', portion of ornanientiition of posterior area, x 4; /'. oriiiiiui'iitaliini 

 near the middle of the ventral border x 4. 

 8, 9. Right valves. 

 10, Left valve. 



11. G. Coitaldiuiim, iVOvh. liower GrecTisarid, Upware. Sedgwick Mu.seum. 



a, right valve; l<, dorsal view of l)otli valves; r, posterior view; 

 (1, ornamentation of posterior area X 4; c, ornamentation near tlic 

 mid-ventral border X 4. (P. 203.) 



12. 0. sp. Lower Greensaud, Seend. Museum of Practical Geology, No. 



2127:1. -r, riglit valve; A, dorsal view. (P. 201.) 

 1:3 — 1.5. c. l/iniiiii'iisc, AVoods. Chalk Rock, Cuckham.sley. Sedgwick Museum. 

 (P. 204.) 



i;!(/, iiit('rn;il cast of right valve x lo ; '', anterior view of the same x H. 



14. Internal east of left valve X li. 



15. Ornamentation drawn from a wax mould of an external cast x G. 



ir.. C. sp. Chalk l?ock, Cuckliamsley. Sedgwick Museum. Internal cast. 

 II, riglit valve ; h, dorsal view of both valves. (P. 20.5.) 



17. C. sp. Upper Chalk (zone of 7?r/c/y/ ;///'■///' nincroiiiitu), l^'iorwich. British 

 Museum, No. Li9413. Internal cast. <i, left valve; Ji, dorsal view 

 of both valves ; c, posterior view. (P. 205.) 



18, 19. G. {Gnivncnrdinvi) jifiiJiosciiirnm, Sow. Upper Greensand, Blackdown. 

 Sedgwick Museum. (P. 20.5.) 



18. liight valve. The anterior marginal part is drawn from anotlier s])ecinien. 

 lO. Titi't valve. Dorsal part decorticated. 



