106 Mr. H. E. Strickland on the genus Cardinia. 



from the marlstone of Byfield in Northamptonshire which is 5| 

 inches long by 3 inches broad. 



7. Cardinia ovalis, Stutchb. (sp.) 

 Lucina leevis, Goldf. Petref. pi. 146. f. 11. 



Pachyodon ovalis, Stutchb. in Ann. Nat. Hist. vol. viii. pi. 10. 

 f. 17, 18, 19. 



Cardinia unionides, Ag. Et. Crit. Moll. pi. 12". f. 7 — 9. 



Var. 1. 



C. cyprina, Ag. Et. Crit. Moll. pi. 12". f. 4—6. 



Formation : lower lias. 



Localities : Dunhamstead and Coltknap hill, Worcestershire ; Ash- 

 leworth and Frethem, Gloucestershire ; Watchet, Somersetshire ; 

 Blumenroth, Coburg. 



M. Goldfuss's specific name lavis is prior to the other two ; but 

 as it is founded on an erroneous identification with the Cordis 

 Icevis of Sowerby, which is a very different shell, I retain Mr. 

 Stutchbury's name ovalis. The two supposed species figured by 

 M. Agassiz are both founded on specimens which I sent to that 

 learned naturalist myself, and I am therefore able to identify them 

 positively with the present species. In Worcestershire this fossil 

 abounds about 100 feet above the base of the lower lias. Single 

 valves are very rare. 



8. Cardinia sulcata, Ag. 

 Cardinia sulcata, Ag. Et. Crit. Moll. pi. 12. f. 1—9. 

 Formation : " Calcaire a Gryphites." 

 Locality : Soleure. 



Judging from the figure and description, the above seems to be 

 a distinct species. 



9. Cardinia aptychus, Goldf. (sp.) 

 Cytherea aptychus, Goldf. Petref. pi. 149. f. 7. 

 Formation : lias. 

 Locality : Amberg. 



I have seen and examined specimens of all the above species 

 except nos. 8 and 9. 



II. Species referable to this genus, but whose specific characters 

 require further investigation. 



1. Pachyodon abductus, Stutchb. in Ann. Nat. Hist. vol. viii. pi. 9. 

 f. 9, 10. 



I think this is probably one of the numerous varieties of C. 

 Listeri. I agree with M. Agassiz that it is not the Unio abductus 

 of Phillips. 



2. Cardinia oblonga, Ag. Et. Crit. Moll. pi. 12. f. 13—15. 

 From the lower oolite of Normandy. Described from a cast, 



