[TAYLOR] MARINE MOLLUSCA 89 
Dawson obtained four specimens in Virago Sound. Like the other west 
=) 
coast Trochidæ this species appears to be partial to Macrocystis. 
311. CALLIOSTOMA cosTATUM, Martyn, sp. 
Trochus costatus, Mart., Univ. Conch., vol. i., no. 34, pl. x., fig. 3 (1784). 
ligatum, Gould, 
&c., &c. 
This is our common Calliostoma and unlike the two species above 
mentioned is usually found between tides. The living shell very often 
has specimens of Crepidula adunca attached to it and when dead has not 
unfrequently Crepidula navicelloides within the aperture. 
2, CALLIOSTOMA VARIEGATUM, Carpenter. 
Rept. Brit. Assoc., 1863, p. 652 (August, 1864); and Proc. Acad. Nat. Sci. Phila., 
1865, p. 61. 
Dr. Kennerley found one living specimen of this shell in Puget 
Sound, but I can find no other record of its occurrence in British Colum- 
bian waters. 
CANTHARIDUS, Montfort. 
313. CANTHARIDUS PUPOIDEUS, Carpenter, sp. 
Fenella pupoidea, Cpr., Rept. Brit. Assoc., 1863, p. 656 (August, 1864) ; and Proc. Cal. 
Acad. Sci., vol. iii. (1865). 
This shell which Carpenter placed in Fenella, is considered by Dr. 
Dall to belong to the subgenus Halistylus (Dall) of the genus Cantharidus 
(Montfort). It was described from specimens taken near Monterey, 
California, and was added to our list by Dr. Dawson, who took one adult 
living specimen at the mouth of Cumshewa Harbour in twenty fathoms. 
Last summer Dr. Newcombe took four living specimens, and a few 
dead ones, at Clayoquot Sound. We have not yet found it on the 
eastern side of Vancouver Island. 
MARGARITA, Leach. 
314. MARGARITA HELICINA, O. Fabricius, sp. 
Trochus helicinus, O. Fab., Fauna Groenl., p. 393, (1780). 
Fine specimens, exactly like European ones, are common between 
tides in a few spots in the neighbourhood of Victoria, also at Sooke 
(Macoun). <A few specimens were taken by Dr. Dawson at the Queen 
Charlotte Islands, and in Johnston Strait, and Queen Charlotte Sound. 
