246 



Ovate-elliptical, equally rounded at both ends, posteri- 

 orly much shorter, urnbones 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. 0,083 4... 0,08 

 Aberdeen. Only a single valve as yet found. 



TELLINA. PROXIMA. Smith in Wern. Mem. 8. p. 

 105. t. I./. 21. Macg. Ab.p. 340. Subovate. com- 

 pressed, thin, dull brown, with irregular concentric 

 striae, 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. f.,.1. Aberdeen, very 

 rare 



CRASSINA ELLIPTICA. Brown III. Conch, t. 18. /. 

 3. ASTARTE C. Macg. Ab- p. 259. (C. Ovata. 

 Brown in Edinb. J. of Nat. Sc. 1 t, 12. f. 8. # C. 

 Depressa of III. Cone. t. IS. f. 2. fide Macgillivray.) 

 C. SEMISTJLCATA 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 



