96 TELLIXID.E. 



Fossil in many places, imder the names of T. oralis, Woodward ; 

 T. ovata, Sowerby ; T. obJiqua, Sowerby, &c Beauport; Montreal 

 (Daivson) ; Udde valla (^Jeffreys'); Portland {Mig-hels) ; Greenland 

 iMo/ler). 



It is quite clear that this shell l^elongs to the same genus as Say's 

 Psammobia fusca. The hinge is precisely the same, and the slight 

 wave along the posterior margin is no more conspicuous than in 

 that shell. Its habit and general aspect are also the same. 



Oeiiiis TEIiLINA, Lin. 1758. 



Shell elongated, sub-equivalve, compressed, angular, and some- 

 what rostrated at the posterior end, where there is an irregular, 

 wave-like fold ; two small cardinal teeth, and generally two lateral 

 teeth in each valve. 



Tellina tenta. 



Fig. 43. 



Shell white, oval, behind shortest, narrowed, very much warped and widely 

 gaping ; lines of growth very fine ; within polished, and with numerous fine, 

 radiating lines. 



D 



TelUna tenta, Say, Amer. Conch, pi. 65, fig. 3. — De Kay, Nat. Hist. New York, 210. 

 — Adams, Best. Journ. Nat. Hist. iii. 232. — Stimpson, Shells of New England, 21. 



Shell small, thin, white, oval ; beaks pointed, moderately promi- 

 nent behind the middle ; posterior part narrowed, the point slight- 

 ly truncated, the posterior hinge-margin curvilinear ; 

 '^' "' valves very convex, the left one most so, widely gap- 

 ing, and very far bent to the right ; posterior fold dis- 

 tinct on the right valve ; outer surface shining, but not 

 polished, minutely wrinkled by the lines of growth, and 

 with a few fine, radiating lines across the middle; inner surface pol- 

 ished, white, tinted with yellow, and covered with radiating lines, 

 which produce a finely indented margin. Hinge very delicate, with 

 two diverging cardinal teeth on the right valve, and a single one 

 on the left ; a posterior lateral tooth on the right valve, and a cor- 

 responding groove on the left ; ligament minute, jirominent ; mus- 

 cular and pallial impressions distinct. Length, three fifths of an 

 inch; height, two fifths of an inch; breadth, one fifth of an inch. 

 Found by Professor xidams in 1838 in Dartmouth Harbor ; and 



