280 Panama Sheik. telleniDjB. 



strise' with concentric crowded somewhat oblique minute 

 striae which terminate much before reaching the umbonial 

 angle covering less than half of the posterior side, and which 

 are also wanting near the anterior dorsal margin: beaks not 

 very prominent: ligament short, conspicuous: lateral teeth 

 obsolete. It is closely allied to T. similis, which is said to be a 

 Caribbean species. 



Length 1.75 inch ; height 1.23 inch ; breadth .5 inch. 



Station. — Unknown. 



Eabitat—Vanama ; 0. B. A. I 

 A single valve was found. 



460. Tellina Columbiensis. 



Synonymy. 



Tellina ColumUensis HaDley in Proc. Zool. Soc. Lond. 



p. 11. - - - Apr. 1844. 

 . — — Hanley in Sowb. Thes. Conch, p. 307. 



No. 166. pi. 65. f. 246. - - 1846, 



Station. — Sandy mud, 12 fathoms; Cuming! Hanley. 



Habitat. — Monte Christi ; Cuming ! Hanley, 



Taboga; C. B. A,I 

 2 specimens were found, 



461. Tellina coilcinna. Nov. sp. 



Shell subelliptical, rather thin, convex, with the anterior side 

 a little larger ; ventral margin moderately excurved ; anterior 

 margin broadly rounded; anterior dorsal margin a little 

 excurved, moderately sloping ; posterior dorsal ma,rgin nearly 

 straight, sloping equally with the anterior dorsal margin ; pos- 

 terior extremity somewhat obliquely and very broadly trun- 

 cated ; flexure slight : shining, snow-white, with a slight tinge 

 of pink in the middle ; with very unequal, and, for the most 



