EXPLANATION OV PLATE LX, 



Amiujcardia cudKii WTiilficld p. 54S 



1-2. Lateral and anterior \ie\vs of llic type specimen. 

 Raritaii clay. 



AsTARTE vETA Conrad p. 549 



3. View of the t3'pc specimen. (After Whitfield.) 



Rai'itai! clay: ]Vas!iinL;fo!!, 



EKiriivr„\ coxK.\Di ( Whitheld), p. 550 



4. A sqneczc from a natnral monld of tlie exterior. 



McrcImutviUc clay-iiuirl : near Jaiiicsbiirg, (iji). 



5. The internal cast of a left vahe, (x2). 



illcrchaiitz'iUc clay-inarl : iicaf Jaiiicsbiii'g, (l-jo). 

 6-S. External and internal views of a left valve and internal view 

 of a right vah'e, (x3)- (The type specimens, after Whit- 

 field.) 



Ji'oodhury clay: Ilacldoiilichl . (rS'^). 



EinpiiYLA dECEmnaria (Conrad) p. 551 



0. Lateral view of the tj'pe specimen. (After Whitfield.) 

 Woodbury clay: HaddonficlJ , (rS^). 



ERiriiYt.A DEcr.jMS (Conrad) p. 551 



10. View of the type specimen, (x2). (After Whitheld.) 



JVoodhiiry clay: Haddonlicld, (iSf). 



Kriph yea parilis ( Conrad ) p. 552 



11. View of llie type specimen. (After Whitfield.) 



Horizon and locality not kuoion. 



