82 Panama Shells. PURPURIDJ3. 



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 Yert.) have been found a valuable addition. 



77. 



Columbella atramentaria. 



Synonymy. 



Columbella atramentaria Sowb. in Proc. Zool. Soc. Loud. 



p. 51. - March 1844. 

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



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



This species closely resembles C. 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. We found this shell under stones near low water 

 mark. 



Habitat. Chatham I., Gallapagos. Sowerby. 



Panama. C. B. A. ! 

 We obtained only three specimens. 



78. Columbella bicanallfera. 



Synonymy. 



Columbella bicanalifera Sowb. in Proc. Zool. Soc. Lond. 



p. 113. June 1832. 



Mull.Synop.Nov.Test.Viv.p.81. 1836. 



_ Sowb. Thes. Conch, p. 137. No. 77. 



pi. 39. f. 144. 1844. 



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

 Sowerby. 



Habitat Gallapagos ; Cuming ! Sowerby : also Muller. 



Taboga ; E. Jewett ! Gould MSS. 



Panama ; C. B. A. ! 



