246 
Ovate-elliptical, equally rounded at both ends, posteri- 
orly much shorter, umbones small and slightly 
prominent ; convex very thin, semitransparent, glossy 
hyaline white, concentrically striolate, about 15 radi- 
ating little elevated ribs; tooth in the form of an 
elongated thin lamella of small extent. 0,0834.,.0,08 
Aberdeen. Only a single valve as yet found. 
TELLINA. Proxima. Smith in Wern. Mem. 8. p. 
105. ¢. 1. f. 21.—Maceg. Ab. p. 340. Subovate, com- 
pressed, thin, dull brown, with irregular concentric 
strize, the umbones very small and nearer the anterior 
end; hind slope little convex, posterior end rounded, 
dorsal slope rapidly declining and nearly straight, 
anterior end subangulated. 4%...1. Aberdeen, very 
rare 
Crassina Exxiptica. Brown Ill. Conch. t. 18. f. 
3.—AsTARTE C. Macg. Ab- p. 259.—(C. Ovata. 
Brown in Edinb. J. of Nat. Se. 1t. 12.f. 8. & GC. 
Depressa of Ill. Cone. t. 18. f. 2. fide Macgillivray.) 
— C. Semisuxoata of Jeffreys M.S. Ovate-elliptical 
compressed, posteriorly much shorter; dorsal line 
nearly straight, elongated, with a linear-lanceolate im- 
pression ; posterior slope concave, the lunule narrow- 
lanceolate; valves not thick, about twenty two broad 
