OF CONCHOLOGY. 233 



garitana raargaritifera^ "being medially contracted, and of an 

 oblong or leguminous shape. The cardinal tooth in the right 

 valve is pyramidal and recurved, wholly unlike the transverse, 

 compressed tooth of Pseudodon. For this shell I propose the 

 name of 



LEGUMINAIA, Conrad. 



L. Maedinensis. 

 Monocondylcea Mardinensis, Lea. 



TRIGONODON, Conrad. 



Oval, somewhat compressed, with a prominent triangular 

 cardinal tooth in each valve, with a deep pit behind it for the 

 reception of the tooth of the opposite valve. 



T. CEEBRISTRIATA. 



Monocondylcea crebristriata, Anthony. 



Catalogue of the Genus Pseudodon, Gould, 1844. 

 (monodontina, conrad, 1852.) 



p. CAMBOJENSIS, (Monocondyloea,) Petit. Cambodia. 



P. COMPRESSA, (i/;,) Lea. Siam. 



P. CuMiNGii, (if.,) Lea, Cambodia. 



P. BUPHRATICA, ( U.,) Bourg. Syria. 



P. iNOSCULARis, Gould. Burmah. 



P. Manhoti, {M.,) Lea. Cambodia. 



P. planulata, (M.,) Lea. Java. 



P. MiTCHONii, (if.,) Bourg. Syria. 



P. Salwekiana, Gould. Burmah. 



P. Saulcyi, ( U.,) Bourg. Syria. 



P. Tripolitana, ( U.,) Bourg. Syria. 



P. Wheatleyi, (M.,) Lea. Syria. 



P. VoNDEMBUSCHiANA, (If,) Lea. Java. 



