ANATINELLA 



TESTA ovata, sequivalvis, subaeqiiilateraHs, 

 latere antico rotundato, postico subrostrato, 

 subtruncato; ligamento interno, proeessui 

 cochleariformi affixo, dentibus duobus cardi- 

 nalibus in utraque valv^ ante processum positis: 

 impressionihus muscular ibus duabus, antiea 

 oblongaj irregulari, postica subeirculari ; 

 impressione museulari pallii Integra: appendice 

 cardinali interna nulla. 



Odd valves of this remarkable shell were brought to 

 England many years since by the late celebrated Dr. 

 Solander, which, however, being imperfect, it was im- 

 possible to place with certainty. The arrival of a few 

 perfect specimens lately from Ceylon has enabled us to 

 ascertain the characters by which it is distinguished from 

 other genera to which it appears most nearly related. We 

 have named this Genus Anatinella on account of its'general 

 resemblance to Anatina; from that, however, it may be 

 known by its being destitute of the testaceous cardinal 

 appendage and the sinus in the muscular impression of 

 the mantle which characterizes that Genus. From Mya, 

 Lutraria and Amphidesma it is also distinguished by having 

 no sinus in the pallial impression. In having the pallial 

 impression entire, and in the characters of the hinge it 

 approaches somewhat to Crassatella, it is not, however, a 

 ponderous, but rather a thin shell, moreover, it has not 

 the thick epidermis nor the lateral tooth of that Genus. 

 We think it properly placed near to it. 



