26 ROYAL SOCIETY OF CANADA 
I have myself dredged this species living, but only on one occasion. 
near Victoria. 
10. PECTEN HASTATUS, Sby. 
Thes. Conch., vol. i., p. 72, pl. xx., fig. 236, = hericiws, Gould. 
Common, and in some places very abundant, on both the east and west 
coasts of Vancouver Island. Varieties are pink, yellow, and very rarely 
pure white. This shell is usually dredged in 10 or 20 fathoms, but may 
sometimes be found living on rocks between tides. On one occasion I 
dredged, in the course of a few hours, more than five hundred specimens 
of this species ; this was in the straits about one mile from Victoria. 
Many specimens are found covered with a sponge, Myzitis 
parasitica, Lambe. This sponge when living is of a bright yellow colour, 
and the Pectens so covered, as they are taken from the dredge, have the 
appearance of small oranges. 
Dr. Dawson found a valve of P. hastatus with a specimen of Bivonia 
compacta attached. I believe, however, that the Bivonia is more usually 
found on a gasteropod— Pachypoma inæquale. 
11. PECTEN RUBIDUS, Hinds. 
Zool. Voy. Sulph., vol. ii., p. 61, pl. xvii., fig. 5 (1844). - 
This is usually considered to be a variety of the last species, and 
perhaps it may be so, 
It is not rare near Victoria, occurring with P. hastatus, but in this 
locality it is always readily separable from that species and does not 
show any intermediate forms. The sculpture is not nearly so rough as 
in P. hastatus, the ribs are equal and more numerous, the shape is 
rounder, and the colours duller. 
12. PecrEN (PSEUDAMUSIUM) VANCOUVERENSIS, Whiteaves. 
Ottawa Naturalist, December, 1893, p. 133, pl. i., figs. 1, la. 
This little shell was first found by Dr. Dawson in 1885, in Forward 
Inlet, Quatsino Sound, 
It was recorded by Mr. Whiteaves as P. Alaskensis, Dall (see below), 
but he has corrected this error, and described the species as new in his 
paper above cited. 
I obtained two specimens of P. Vancouverensis in Departure Bay in 
August, 1888, and these were compared with the Pectens in the British 
Museum, through the kindness of Mr. E, A. Smith, and with those in 
the United States National Museum by Dr. Dall and pronounced distinct. 
Some conchologists, however, have inclined to the view that this may be 
