[rAYL1oR] MARINE MOLLUSCA 25 
PELECYPODA. 
OSTREA, Jinne. 
6. OSTREA LURIDA, Cpr. 
Suppl. Rept. Brit. Assoc., 1863, p. 645 (Aug., 1864); and Journ. de Conch., vol. 
xii., p. 137 (April, 1865). 
Common on all the coasts of British Columbia, northward to Queen 
Charlotte Sound. Dr. Dawson found specimens at Malaspina Inlet and 
also (abundantly) at Bradley Lagoon, Blunden Harbour, Queen Char- 
lotte Sound, on the mainland side. This last locality is said by Mr. 
Whiteaves (Trans. Roy. Soc. Can. iv., iv., 118) to be the most north- 
erly locality on record for the species in British Columbia. 
7. OSTREA VIRGINICA, Gmelin. 
Syst. Nat., ed. xiii., vol. i., p. 3336, no. 113 (1788). 
This species was introduced into the “ Victoria Arm” some years 
ago, and has become to a certain extent naturalized. Prof. Macoun 
last summer (1893) found a finely grown adult specimen some little 
distance from the mouth of the Colquitz River, which flows into the 
Victoria Arm, 
PLACUNANOMIA, Broderip. 
8. PLACUNANOMIA MACROSCHISMA, Deshayes, sp. 
Anomia macroschisma, Desh., Rev. Zool. Soc. Cuv., p. 359 (Dec., 1839); Mag. 
de Zool. (Guerin’s) 1841, pl. xxxiv. 
Very common everywhere between tides, and found also, but less 
frequently, in deeper water. | 
My finest specimens are from the rocks at Vesuvius Bay, Salt 
Spring Island. Very curious forms occur in the burrows of Penitella. 
PECTEN, Müller. 
9. PECTEN CAURINUS, Gould. 
Proc. Bost. Soc. Nat. Hist., vol. iii., p. 345 (Dec., 1850); and U.S. Expl. Exped., 
Mollusea, p. 458, fig. 569-569b (1852). 
Not very common. This species was not found by Dr. Dawson 
either at the Queen Charlotte Islands or at the north of Vancouver 
Island. 
The specimens [ have seen have nearly all been from the neighbour- 
hood of Comox, where Richardson dredged it in 1874, and where Dr, 
Newcombe has since taken it. 
