[TAYLOR] MARINE MULLUSCA 77 



lections. He remarks of this and the next species, " Rare, no ditterences 

 have been detected on comparing the Herm (British) and Xeeah liay 

 specimens." 



T. adoerS'i does not ajjpear to have been noticed here by recent 

 collectors. 



Dr. Gwyn Jeffreys considered this species to be equivalent to 

 the Mediterranean form, = perversum. Linne, but Forbes and Hanley 

 considered the two to be distinct. 



CERITHIOPSLS, I^rbes and Hanley. 



262. Cerithiopsis tuberculata (Montagu) Carpen«ter. 



? MurcjL- tubercularis, Mont., Test. Brit., p. 210 {ISOU). 



This is another species from Swan's collection. 



Carpenter considered it identical with the English shell, but Jeffreys 

 (Brit. Conch., iv., 268) says that it is not the same. Dr. Dawson took 

 it at Dolomite Narrows and in Virago Sound (at the latter place in 

 8-15 fathoms), and I have found it under stones at low tide near Victoria. 



263. Cerithiopsis munita. Carpenter. 



Rept. Brit. A.s.soc, 18(W, p. 6(J0 (August, 18(54) ; and Ann. Mag. Nat Hi.st., .series 8, 

 vol. XV., p. 32 (January, 1865). 



264. Cerithiopsis columna, Carpenter. 



Kept. Brit. A.ssoc, 18(53, p. (5(50 (August, 18(54) ; and Ann. Mag. Nat. Hist., series 3, 

 vol. XV., p. 32 (January, 186.5). 



Both of these species were first found by Swan at Neeah Bay. 

 They are evidently rare with us, a very few specimens only having been 

 found near Victoria. 



BITTIUM, Leach. 

 265. BiTTiuM PiLOSUM, Gould, sp. 



Cerithium JilosiDiu Gould, Proc. Best. Soc. Nat. Hist., vol. iii., p. 120 (May, 1849); 



and U.S. Expl. Exped., Mollusca, p. 149, fig. 175, 175c (1852). 

 Var. esuriens, Cpr., Rept. Brit. Assoc, 18(5:^, p. (555 (August, 1864) ; Ann. Mag. Nat. 



Hist., series 3, vol. xv., p. 181 (March, 1865) ; and Journ. de Conch., vol. xii., 



p. 142 (April, 18&5). 



Very common everywhere between tides. The common form has 

 the mouth of the shell purplish or chocolate coloured within, but speci- 

 mens from Clayoquot Sound and a few collected at Salt Spring Island, 

 are pure white. 



