TELLIKA, Panama Shells. 279 



Station. Unknown. 



Habitat. Mazatlan ; Lt. Green ! Gould MSS. 



Santa Barbara ; Col. Jewett ! Gould MSS. 



Panama ; C. B. A. ! 

 1 valve only was obtained. 



. The number of species in this genus which 

 occur at Panama is extraordinary : it will be seen that 19 were 

 collected. 



458. Tellina aurora ? 



Synonymy. 



Tellina aurora Hanley in Proc. Zool. Soc. Lond. p. 147. Sept. 1844, 

 --- . Hanley in Sowb. Thes. Conch, p. 301. 



No. 153. pi. 58. f. 76. 1846. 



Station. Soft sandy mud in 10 fathoms ; Cuming ! Hanley, 



Habitat. Panama; Cuming! Hanley. 

 Rio Janeiro ; Jay. 

 Panama ; C. B. A. ! 

 2 entire specimens were found. 



Probably there is some error in Dr. Jay's statement. One of 

 our specimens is colorless, and both of them are a little more 

 acuminated posteriorly by the more descending slope of the 

 dorsal margin than the specimen which is figured in the The- 

 sawus. An odd valve is less acuminated. 



459. Tellina cognata. Nov. sp. 



Shell subelliptical, solid, convex, subequi lateral ; ventral 

 margin slightly excurved ; anterior margin broadly rounded ; 

 anterior dorsal margin nearly straight, sloping ; posterior dor- 

 sal margin slightly concave, sloping equally with the posterior 

 dorsal ; posterior extremity somewhat obliquely and very 

 broadly truncated ; flexure slight ; white, with a pale reddish 

 or brownish tinge ; with excessively minute unequal radiating 



