ANODONTITKS 



141: 



sculptured; epidermis chestnut with faint vestiges of darker 

 rays on the dorsal slope, subshining; nacre flesh-colored or 

 purple-tinted, iridescent; muscle scars shallow; ligamental 

 patch triangular. 



Length 63, height 2,7^ diam. 20 mm. 



Trinidad Island, West Indies. 

 Anodonta Icotaiidi Gru'pv. Ann. and Mag., XIV, 1864, P- 243. 

 Margaron (Anodonta) Icotaudi Lea, Syn., 1870. p. 83. 

 Glabaris leotandi SiMrsoN, Syn., 1900, p. 929. 



At the time of publishing the Synopsis I had never seen 

 this species, and as it had not been figured I was unable to 

 give any idea as to its relationships. Recently Mr. William 

 Moss, of Ashton-under-Syne, England, has donated an au- 

 thentic specimen from Trinidad to the National Museum.. 

 This shell is somewhat worn, having been taken dead, but it 

 is in condition to give a fair idea of the characters of the 

 species. I place it with some hesitation in the group of A.^ 

 patas^onicus. It scarcely gapes either in front or behind. 



Group of Anodontitcs hrevis. 



Shell rhomboid, swollen, with full, high beaks and a pinched- 

 up posterior ridge. 



Anodontitks r.REVJS YSowerbv). 



Shell rhomboid, inflated, solid, rather short, somewhat in- 

 equilateral ; beaks full and elevated ; posterior ridge angled, 

 pinched up ; hinge line nearly straight ; posterior end slopingly 

 rounded ; anterior end rounded, cut away slightlv below ; base 

 curved ; epidermis blackish-brown, sinuously striated ; nacre- 

 orange with a thick border. 



Length 66, height 43.5 mm. 



La Plata, S. A.merica. 

 Anodon hrcz'is SowKRnv, Conch. Icon., XA'IT, 1870, pi. xxxi.. 



fig. 124. 

 Glaharis brrz'is Simpson, Svn., 1900. p. 932. 



I have never seen this species and know nothing whatever 

 about it excepting from Sowerby's figure and very brief de- 



