82 Panama Shells. purpueid^. 



M. Kiener's monograph of the genus, most of them are easily- 

 determined with Mr. Sowerby's accurate figures. To these 

 the descriptions of many of the species by Deshayes (in Lam. 

 An. sans Vert.) have been found a valuable addition. 



11. Coluinbella atramentaria. 



Synonymy. 



Golumhella atramentaria Sowb. in Proc. Zool. Soc. Lond. 



p. 51. - - - March 1844. 

 Sowb. Thes. Conch, p. 134. No. 



67. pi. 40. f. 174. - 1844. 



This species closely resembles 0. nigricans, differing chiefly 

 in the shorter spire and more obese outline. Its coloring is also 

 different from the common style of that species, consisting of 

 pale rectangular spots on a greyish black ground. 



Station. — Wo found this shell under stones near low water 

 mark. 



Habitat. — Chatham I., Gallapagos. — Sowerby. 



Panama. — C. B. A. ! 

 We obtained only three specimens. 



78. Coluinbella 1>icanalirera. 



Synonymy. 



Columlella hicanalifera Sowb. in Proc. Zool. Soc. Lond. 



p. 113. - June 1832. 



Miill.Synop.Nov.Test.Viv.p.Sl. 1836. 



Sowb. Thes. Concli. p. 137. No. 77. 



pi. 39. f. 144. 1844. 



Station. — In sandy mud, at 10 fathoms depth ; Cuming ! 

 Sowerby. 



Habitat. — Gallapagos ; Cuming I Sowerby : also Muller. 

 Taboga ; E. Jewett ! Gould MSS. 

 Panama ; C. B. A. [ 



