56 



AMERICAN COIIBICULAD^E. 



kindly presented to me by the original describer. It is easily 

 distinguished from all other species of Sphserium by the very 

 great disproportion which exists between the lateral margins. 



36. Sphaerium veatleyii, C. B. ADAMS. 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 ; striae 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, 



S. veatleyii. 



elongated. 



Long. 0.18 ; Lat. 0.12 ; Diam. 0.06 inches. 



Hab. North America, in the Island of Jamaica. (Cabinets of Jay and 

 Prime.) 



Cyclas veatleyii, C. B. ADAMS, Contrib. Conch. 1849, 44. 

 Pisidium veatleyii, PETIT, Journ. Conch. II, 1851, 421. 

 Pisum veatleyii, DESHAYES, Brit. Mus. Cat. 1854, 283. 

 Musculium veatleyii, ADAMS, Rec. Gen. II, 1858, 452. 



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

 Prof. Adams, is somewhat allied to S. portoricense ; it is, how 

 ever, smaller, more delicate, more elongated, the valves are less 

 full, the beaks less large, and the hinge is more slight. 



1. Sphaeriuin portoricense, PRIME. Animal not observed. 



Shell small, transversely elongated, rhombic, equi- 

 Fig. 57. lateral, slightly compressed ; margins generally straight, 



in especial the posterior margin ; beaks central, slightly 

 inclined towards the anterior side, calyculate, approxi 

 mate at apex ; striae regular, quite heavy with respect 

 to the size of the shell ; epidermis light brownish- 

 yellow ; cardinal teeth strong ; lateral teeth strong, 

 short ; valves solid, very little convex ; the interior, 

 S. portoricense. and at times the exterior, irregularly spotted with a few 



dots of very dark color. 

 Long. 0.25 ; Lat. 0.20 ; Diam. 0.12 inches. 

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



Sphserium portoricense, PRIME, Proc. Acad. Nat. Sci. Phila. 1861,415. 



