26 ROYAL SOCIETY OF CANADA 



I have myself dredged this species living, but only on one occasion, 

 near Victoria. 



10. PeCTEN HASTATtrs, Sb}'. 



Thcs. Coiu'li.. vol. i., p. 72, pi. xx.. rtg-. '£H\ - /irrirhis, Gould. 



Common, and in some places very abundant, on both the east and west 

 coasts of Vanconver Island. Varieties are pink, yellow, and very rarel}' 

 pure white. This shell is usually dredged in 10 or 20 fathoms, but maj'^ 

 sometimes be found living on I'ocks between tides. On one occasion I 

 dredged, in the course of a few hours, more than tive hundred specimens 

 of this species ; this was in the straits about one mile from Victoria. 



Many specimens are I'ound covered with a sponge, Myxilis 

 parasitica, Lambe. This sponge when living is of a bright yellow colour, 

 and the Jr^ectens so covered, as they are taken from the dredge, have the 

 appearance of sjnall oranges. 



Dr. Dawson found a valve of P. hastatus with a specimen of Bivonia 

 compacta attached. 1 believe, however, that the Bivonia is more usually 

 fonnd on a gasteropod — Packypoma irnvquale. 



11. Pecten rubidus, Hinds, 



Zool. Voy. Snlph., vol. ii.. p. 61, pi. xvii., tig;. .5(1844). 



This is nsually considered to be a variety of the last species, and 

 perhaps it may be so. 



Jt is not rare near Victoria, occurring with P. hastatm, but in this 

 locality it is always readily separable from that species and does not 

 show anj^ 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. Pecten (Pseudamusium) Vancouverensis, Whiteaves, 

 Ottawa Naturalist, Deeeuiber. ISJK^, p. i:«, pi. i.. tigs. 1, \a. 



This little shell was tirst 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 the^ 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 



