32 



SYNOPSIS OP 



6^ 

 H 

 Z 

 O 

 Q 

 O 

 Z 

 < 



z 

 o 

 z 



'OBOVATE. 



*esula.t Jan. 



Iiid. esula. D'Orfe. 



crassa, Sioain. 



WIDE. 



elongata. Swain. 

 *ensiformis. Spix. D'Orb. 

 *cylintlracea. Lea. 

 *subcylindracea. Lea. 

 *Buchanensis. Lea. 

 *exilis. Lea. 



OBOVATE. 



*angulata. Lea. 



z 

 o 



Q 

 O 

 Z 

 < 



Z 



o 

 z 



fARCUATE. 



I *lenebricosa. Lea. VOrh. 



2 I *arcuata. Fer. 

 sinuosa. Lnm. 

 *solenifoimis. UOrh. 



The following species are unknown to me ; 

 Anodonta folium. Fer. 

 Anodonta Cliinensis. Fer. 

 Anodonta ciiivat us. Fer. 

 Anodonta lugubiis. Say. 

 Anodonta impura. Say. 

 Anodonta arcuta. Call. 

 Anodonta Tsevaii. Rang. 

 Anodonta Feirarisii. D^Orh. 

 Anodonta lucida. VOrh. 

 Anodonta Pueldiana. D'Orb. 



Fossil Species. 



Anodonta? Abyssina. Mort. 



t M. D'Orbigny thinks that this is my Blainvilliana, but haviag his specimens and mine of both the spe- 

 cies, I am induced still to believe that I am correct. The two specimens resemble each other, but are certainly 

 distinct. The deflected palleal cicatrix exists in both, but the esula is more rotund, and the dorsal margin is 

 more sinuous, and the nacre bluish white, while the five or six specimens of Blainvilliana which I have seen 

 are all salmon colour. 



