fTAYLOK] MARINE MOLLUSCA 27 



the young of P. caurinus, to which, to the naked eye. it bears some 

 resembhxnce. 



Last summer, in comi)any with Prof. Macoun, T dredged a series <»f 

 various ages in Departure Bay, and I am satisfied that I have adult 

 shells. The type specimen measures 7*5 X 7-75 X -"25 mm., and is the 

 lai'gest I have seen. 



13. Pecten (Pseudamusium) Alaskensis, Dall. 

 Amer. .Jour. Conch., vol. vii., p. 15.5, pi. xvi., flii. 4 (Novemlier, 1S71). 



This species, with which the last named was at first confounded, did 

 formerly inhabit our seas, as is proved by the presence of the fossil 

 shells in a Pleistocene deposit at Point Holmes, Coraox. Valves, col- 

 lected and kindly given to me by Dr. Newcombe, are in ray cabinet 

 from this locality. The species is probably still living in our northern 

 waters. 



P. Alaskensis and the fry of P. caurinus are figured in one of the 

 valuable and cheap United States Government publications.' 



This inexpensive work is within the reach, and should be in the po.s- 

 session, of every American conchologist. The figures alluded to are on 

 plate v., and should be compai-ed with that of P. Vancouver ensis in the 

 " Ottawa Naturalist.'" 



HINNITBS, Defrance. 



14. lIiNNiTES (iKiANTEus, Gray. 



H'nniitd i/iyaiifea. Gray, Ann. Phil., vol. xii.. p. 108 (Auti., 1S20). 



Not rai'e, being found in all the localities examined. It occurs 

 attached to boulders from extreme low water to twenty or more fathoms 

 in depth. Dr. Dawson found it at Queen Charlotte Islands, and in 1885 

 in several more southerly localities. My largest specimen is 175 X 138 

 mm., but 1 have no doubt that these dimensions are often exceeded. 



LIMATULA, Searles-Wood. 



15. LiMATULA SUBAURICULATA, MoutagU. Sp. 



Pcdcn sulKniriculatuK, Montagu, Test. Brit., .suppl. p. O^l p. xxix.. Mj;. 2(lS0s>. 



This species rests its claim to a place on our list upon two living- 

 specimens dredged by Dr. Dawson in 1885, one in Forward Bay, .John- 

 ston Strait, and the other in Alert Bay, Queen Charlotte Sound. Both 



' " Bulletin of the United States National Museum No. 37," entitled " A Preliui- 

 inary Catalogue of the Shell-bearing Marine Mollusks and Brachiopods of the South- 

 ea.stern Coast of Uniterl States. " 



