PLATE XVII. 



'-^^swfei^3:.-- 



■■^ M>i\''-'t 





i^2 



10 -b 



lib. 



aia,. 



12 "b. 



13 3L. 



IQb. 



13 c 



13 a. 



14a.. 



TABroci del, 

 A.THolliok htt 



"VVeeljlJewroan imp . 



CRETACEOUS LAMELLIBRANCH.IA 



