[TAYLOR] MARINE MOLLUSCA 77 
lections. He remarks of this and the next species, Rare, no differences 
have been detected on comparing the Herm (British) and Neeah Bay 
specimens.” 
T. adversa does not appear 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. 
CERITHIOPSIS, Forbes and Hanley. 
262. CERITHIOPSIS TUBERCULATA (Montagu) Carpenter. 
? Murex tubercularis, Mont., Test. Brit., p. 270 (1803). 
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. Assoc., 1863, p. 660 (August, 1864); and Ann. Mag. Nat Hist., series 3, 
vol. xv., p. 32 (January, 1865). 
264. CERITHIOPSIS COLUMNA, Carpenter. 
Rept. Brit. Assoc., 1863, p. 660 (August, 1864); and Ann. Mag. Nat. Hist., series 3, 
vol. xv., p. 32 (January, 1865). 
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. Brrrtum FILOsuM, Gould, sp. 
Cerithium filosum, Gould, Proc. Bost. 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., 1863, p. 655 (August, 1864); Ann. Mag. Nat. 
Hist., series 3, vol. xv., p. 181 (March, 1865) ; and Journ. de Conch., vol. xii., 
p. 142 (April, 1865). 
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. 
