706 proceedings of the academy of [nov., 



Notes. 

 I have not beeu able to find in the literature the Cardita minima 

 of Sowerby, to which Guppy refers a Recent and Pliocene form 

 from Trinidad. The Cardita " affinis Shuttleworth " of Morch's 

 Poulsen catalogue, from the West Indies, is probably due to a 

 momentary mental confusion between C. gracilis Shuttleworth and 

 C. affinis of the Pacific coast. At any rate, I have not been able 

 to discover any such species in the literature. Cardita dadylus 

 Bruguiere and C. cardiioidea Blainville, from the Antilles, belong 

 to Coralliophaga. Cardita incrassata Conrad is exotic, and Car- 

 dita ovata C. B. Adams, 1845, is Venus pygmcea Lamarck, as I 

 have proved by an examination of the types at Amherst. I 

 regard the Miocene Venericardia granulata Say, to which Conrad's 

 V. borealis has been referred by Verrill and Bush, as suiBciently 

 distinct. Cardita ardica Bruguiere is referable to Saxicava. 



West American Species. 

 Cardita Grayi Ball, 1902. 



Cape St. Lucas, the Gulf of California and south to Panama 

 and the Galapagos Islands. 



' Trapezoidal and inflated, this is a very recognizable species. The 

 Cardita incrassata cited by Carpenter in 1864 from the Galapagos 

 Islands is probably this species. It is Cardita crassa Gray in 

 Beeclmfs Voyage, 1839, but not of Lamarck, 1819. 

 Cardita (laticostata) Sowerby,i 1832. 



Guaymas, Mexico, and south to Panama and Guayaquil. 



This shell has the aspect of C. floridana, but the hinge is desti- 

 tute of lateral teeth, unless we regard the lunular pustule as a 

 tooth. C. tricolor Sowerby, 1832, is a color variety, and C. 

 angimlcataUeexe, 1843, has been claimed by Tryon, 1872, to be 

 only a variety with flatter ribs and narrower channels. Cardita 

 turgida Valenciennes, 1846, not Lamarck, 1819, is synonymous, 

 according to Carpenter. 

 Cardita (Carditameral aflftnis Sowerby, 1832. 



Margarita Bay on the west coast of Lower California, the Gulf 

 of California, and southward to Panama. 



Large, elongate, with small cardinal teeth; the northern speci. 



^ Not Cardita laticostata Pusch, 1837. 



