34 PROCEEDINGS OF THE ACADEMY OF 



28. Sph. Veatleyi, C. B. Adams. 



Cyclas Veatleyi, C. B. Adams, Contrib. Conch. 44, 1849. 

 Pisidium " Petit, II. Conch, ii. 421, 1851. 

 Pisum " Desh., Brit. Mus. Cat. 283, 1854. 



Musculium " Adams, rec. gen. ii. 452, 1858. 



Animal not observed. Shell small, transversely elongated, inequilateral, 

 compressed; anterior and inferior margins rounded; posterior margin sub- 

 truncate ; beaks situated towards the anterior side and inclined in that 

 direction, small, prominent, calyculate ; valves slight, interior irregularly 

 spotted with dark blotches ; stripe regular, coarse for the size of the shell ; 

 epidermis horn color with a tinge of brown ; hinge margin nearly straight : 

 cardinal teeth small but distinct, placed in the shape of the letter V reversed ; 

 lateral teeth well developed, elongated. 



Long. 3-16; lat. 2-16; diam. 1-16 inches. 



Hab. N. America, in the Island of Jamaica. (Cabinets Jay and Prime.) 



This rare species, of which I received specimens from the late Prof. Adams, 

 is somewhat allied to the Sph. Portoricense; it is, however, smaller, more 

 delicate, more elongated, the valves are less full, the beaks less large, and the 

 hinge in every way more slight. 



29. Sph. Portoricense, Prime, Proc. Acad. Nat. Sci. Phila., 1861. 

 Animal not observed. Shell small, transversely elongated, rhombic, equi- 

 lateral, slightly compressed ; margins generally straight, in especial the pos- 

 terior margin ; beaks central, slightly inclined towards the anterior side, 

 calyculate, approximate at apex ; striae regular, quite heavy considering the 

 size of the shell ; epidermis light brownish-yellow ; cardinal teeth strong ; 

 lateral teeth strong, very much drawn up ; valves solid, very little convex ; 

 the interior, and at times the exterior, irregularly spotted with a few dots of 

 very dark color. 



Long. \ ; lat. 1-5 ; diam. ^ inches. 



Hab. Portorico, West Indies. (Cabinets Swift and Prime.) 

 The specimens from which this description were prepared were kindly fur- 

 nished to me by Mr. Swift of St. Thomas. In proportion to its size this 

 species is quite robust. It is different from the generality of the West Indian 

 and South American Sphseria by its sulcations, which are regular and deep. 

 In shape and appearance it recalls the young of Sph. sulcatum. It is 

 allied to Sph. Veatleyi in outline, but otherwise it is different, in being 

 heavier and of a larger size. 



& v 



30. Sph. s e c u r i s , Prime. 



Cyclas securis, Prime, Bost. Proc. iv. 160, 1851. Ann. N. Y. Lyceum, 



v. 218, pi. vi. 1851. 

 C. cardissa, Prime, Bost. Proc. iv. 160, 1851. 

 C. crocea, Lewis, lot*, sub. cit. v. 25, 1854. 



Animal pinkish, syphons of the same color. Shell rhombic-orbicular, ven- 

 tricose, subequilateral, both sides of very nearly the same length ; anterior 

 margin a little curved ; posterior margin abrupt, forming an obtuse angle with 

 the hinge margin ; basal margin much longer than the superior margin, 

 rounded ; beaks large, calyculate, slightly inclined towards the anterior, very 

 approximate at apex ; valves slight, very convex, especially in the region of 

 the umbones ; stria? delicate, regular, hardly perceptible ; epidermis glossy in 

 some cases, very variable in color, but generally of a greenish-horn, at times 

 of a brilliant yellow or straw color ; hinge margin curved, narrow ; cardinal 

 teeth very small, united at base ; lateral teeth slight, elongated, very narrow. 



Long. 6-16 ; lat. 5-16 ; diam. 4-16 inches. 



Hab. N. America, in the States of Massachusetts, Vermont, Pennsylvania 

 and New York. (Cabinets Jay, Lewis aud Prime.) 



[Feb. 



