30 ROYAL SOCIETY OF CANADA 
water at Port Neville, near Johnston Strait. This would bean unusual 
station for the species, as it is generally found in deeper water and com- 
pletely encased in a “nest” constructed chiefly of its own byssal threads. 
23. MODIOLARIA NIGRA, Gray, sp. 
Modiola nigra, Gray, Suppl. to App. to Parry’s First Voyage, p. 244. 
Distribution and station similar to those of M. levigata, but the 
present species does not construct a “nest.” 
24, MoproLARIA TAYLORI, Dall, MS. 
This species has been found by me abundantly at Victoria, between 
tides, nestling at the roots of corallines. It is a small species not ex- 
ceeding half an inch in total length and resembling in habit AZ. discors, 
Linne, of British seas. 
This species has not been described, but has been widely distributed 
under Dr. Dall’s manuscript name. 
25. MODIOLARIA MARMORATA, Forbes, sp. 
Mytilus marmoratus, Forbes, Malac. Monen., p. 44. 
Recorded by Carpenter in his “Supplementary Report” as from 
Puget Sound (Kennerley, one specimen), with the remark, “ Exactly 
accords with Atlantic specimens.” 
I was inclined to think at one time that the last named species 
might be the one intended, but it is so very different to A]. marmorata, 
that Dr. Carpenter could not have made such a mistake. Moreover, I 
find that M. marmorata is on record from several other localities in the 
Pacific Ocean both to the north and the south of us. It is also found, 
according to Jeffreys,' in Japan. 
CRENELLA, Brown. 
26. CRENELLA DECUSSATA, Montagu, sp. 
Mytilus decussatus, Mont., Test. Brit., suppl. p. 69 (1808). 
Common in ten to twenty-five fathoms and probably to greater 
depths. Our shells are much larger than Atlantic specimens. Mr. 

! *On-some Species of Japanese Marine Shells and Fishes which inhabit also the 
North Atlantic,” by J. Gwyn Jeffreys in Journal of the Linnean Society (Zoology), 
vol. xii., p. 100, November, 1874. In this paper Dr. Jeffreys mentions more than forty 
species of mollusca common to Japanese and European waters, and, as might be 
expected, the majority of these species occur also on the West American coast. 
Several additions to the list have been made by subsequent writers. 
