[TAYLOR] MARINE MOLLUSCA 27 
the young of P. caurinus, to which, to the naked eye, it bears some 
resemblance. 
Last sammer, in company with Prof. Macoun, I dredged a series of 
various ages in Departure Bay, and I am satisfied that I have adult 
shells. The type specimen measures 7°5 X 7°75 X 2:25 mm., and is the 
largest I have seen. 
13. Pecren (PSEUDAMUSIUM) ALASKENSIS, Dall. 
Amer. Jour. Conch., vol. vii., p. 155, pl. xvi., fig. 4 (November, 1871). 
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, Comox. Valves, col- 
lected and kindly given to me by Dr. Newcombe, are in my 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 pos- 
session, of every American conchologist. The figures alluded to are on 
plate v., and should be compared with that of P. Vancouverensis in the 
‘Ottawa Naturalist.” 
HINNITES, Defrance. 
14. HINNITES GIGANTEUS, Gray. 
Hinnita gigantea, Gray, Ann. Phil., vol. xii., p. 103 (Aug., 1826). 
Not rare, 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 I have no doubt that these dimensions are often exceeded. 
LIMATULA, Searles- Wood. 
15. LIMATULA SUBAURICULATA, Montagu, sp. 
Pecten subauriculatus, Montagu, Test. Brit., suppl. p. 63, p. xxix.. fig. 2 (1808). 
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 Prelim- 
inary Catalogue of the Shell-bearing Marine Mollusks and Brachiopods of the South- 
eastern Coast of United States.” 
