PLATE XXIII. 

 Cyprina (continupfl). 



Figs. 



],2. C. {VcmUcnnlia) lineolata (Sow.). Upper Greensand, Blackdown. 

 Sedgwick Mnspnm. TJiq-ht valves. 2, a sliort form. (P. 14:}.) 



3. C. [Vcmlicardia) truncnta (Sow.). Upper Greensand, Blackdown. The 



Type. Bristol Museum, a, left A'alve ; A, dorsal view of the same. 

 (P. 1.1.5.) 



4. 0. [Yi'nilicariVia) fruncata ? (Sow). Upper Greensand, Blackdown. Exeter 



Museum. Left valve. Probably an elongate variety of r. //•»»(■«/((. 

 (P. 145.) 



5. C. {YpyiUicardla) tnincaia ? (Sow.). LTpper Greensand, Blackdown. 



Sedgwick Museum. n, right valve ; //, hinge. Probably a short 

 variety of C iruueatd. (P. 145.) 



G-9. C. <jii<nJnil„, d'Orb. (iiault, Folkestone, except fig. T.. (P. 14(;.) 



(i. Uppor GroeusauJ, Waniiinstor. Soili;\vick Miisciiiu. lutonial cast, lliglit 

 valve. 



7. S('ilt;'\vi<-k Muspum. a, left valve ; 6, dorsal view. 



8. Erilisli Museum, L 9183. Riu-lit valve, deeorticated. 



9. Sedgwick Museum, a, left valve ; h, dorsal view. 



Geinis — Tr.vpeziitm, r. Milhlfcldt. 



10,11. T. ? (imidifiinnc (Keep.). Lower Greensand, Upware. (P. 148.) 



10. The Type. Sedgwick Museum, n, right valve ; It, dorsal view. 



11. Mr. "Walker's Collection. Anterior view. 



12-15. T. ? s((]unmosnm (Keep.). Lower Greensand, Upware. Sedgwick Museum, 

 except fig. 14. (P. 148.) 



12. Left valve. 



1.3 a, right valve ; h, dorsal view. 



14. Mr. Walker's Collection, a, left valve, x li ; h, interior of s.ame, x \}i. 



15 n, right valve; h, dorsal view. 



1(). T. .^ sp. Lower Greensand, Upware. Sedgwick Museum, f/, left valve ; 

 //, dorsal view. (P. 149.) 



17-19. T. trapezoidaJe (Rcim.). Chalk Rock, Cuckhamsley. Sedgwick Museum. 

 (P. 149.) 



1 7 a, left valve ; h, dorsal view. 



18 a, right valve ; h, anterior view. 

 19. Eit;lit valve. 



