536 



AHCINvE. 



or paleaceous epidermis. Hinge with the teeth oblong, 

 dilated, and divided into numerous plates more or less 

 oblique at the outer ends ; ligament external ; ligamental 

 area broad, smooth, or with concentric cartilage grooves. 

 Pallial impression entire. 



Syn. Anadara, Gray, 



Ex. A. antiquata, Linncvus, pi. 124, fig. 5, 5, a. 



The members of this group are pretty numerous, and are 

 widely distributed, chiefly in tropical seas. 



Species of Anomalocardia. 



antiquata, Linn. 

 auriculata, Lam. 

 clathrata, Reeve. 

 crebricostata, Reeve. 

 cuneata, Reeve. 

 Deshayesii, Hani. 

 ferruginea, Reeve. 

 forraosa, Sow. 

 fulgetruta, Brod. 

 gibbosa, Reeve. 

 grandis, Brod. and Sow. 

 granosa, Linn. 

 Hankeyana, Reeve. 

 hians, Reeve. 

 holoserica, Reeve. 

 inflata, Reeve. 



lateralis, Reeve. 

 Luzonica, Reeve. 

 maculosa, Reeve. 

 multicostata, Sow. 

 navicella, Reeve. 

 obliqua, Reeve. 

 pectunculoides, Scacchi. 

 radiata, Reeve. 

 rotundicostata, Reeve. 

 scapha, Chem. 

 secticostata, Reeve. 

 simihs, C. B. Adams. 

 sobria, Gould. 

 tuberculosa, Sow. 

 uropigmelaua, Bory. 



Genus NOETIA, Gray. 



Shell trigonal, ventricose, inequilateral, equivalve, 

 closed in front, hinder slope keeled ; surface of valves 

 strongly costate, and covered with a dark, foliaceous epider- 

 mis. Hinge with the anterior tooth elongated, divided into 



