CYTHEREA. Panama Shells. 273 



minent, approximate : posterior area long and narrow, well 

 defined : lunule cordiform, defined by a well impressed line ; 

 both, areas striate : margin of the interior not crenulate : ante- 

 rior tooth much larger than the others. This shell belongs to a 

 group of very closely allied species, among which are C. inflata^ 

 C. albida, C. convexa, &c. 

 Length 1.25 inch ; height 1 inch ; breadth .68 inch. 



Station, Unkn own. 



Habitat. Panama ; C. B. A. ! 

 We found 8 specimens on the reef. 



446. Cytherea radiata. 



Synonymy. 



Cytherea radiata Sowb. in Proc. Zool. Soc. Lond. p. 23. Feb. 1835. 



Hanley in Descr. Catal. p. 106. 1845 ? 



Sowb. Thes. Conch, p. 615. No. 9. pi. 128. f. 



28-31. - - 1851. 



Station. In sandy mud at a depth of 9 fathoms ; Cuming [ 

 Sowerby. 



Habitat. Salango and Xipixapi ; Cuming ! Sowerby, 

 West Columbia ; Hanley : also Jay. 

 Panama ; C. B. A. ! 



2 specimens were found. 



447. Cytherea squalida. 



/Synonymy. 



Cytherea xqualida Sowb. in Proc. Zool. Soc. Lond. p. 23. Feb. 1835, 



biradiata Gray in Beech. Voy. Zool. p. 151. pi. 43. f. 5. 1839, 



Siebold in Wiegm. Archiv. 1839, 



squalida Sowb. Thes. Conch, p. 629. No. 61 (pars). 



pi. 181. f. 87. (88, 89 exclus.) 1851. 



Mr. Sowerby (in Thes. Conch.) says that the species, as there 

 constituted, was first named from specimens brought by Mr, 



