34 ROYAL SOCIETY OF CANADA 
Mr. E. A. Smith (in Ann. Mag. Nat. Hist., series 5, vol. vi., p. 289 
[1880]) described Yoldia Vancouverensis, n. sp., from a specimen taken 
near Victoria. Judging by the description, Vancouverensis must be 
placed in the synonymy of Y. amygdalea. 
VENERICARDIA, Lamarck. 
41. VENERICARDIA VENTRICOSA, Gould, sp. 
Cardita ventricosa, Gould, Proc. Bost. Soc. Nat. Hist., vol. iii., p. 276 (July, 1850); 
and U. S. Expl. Exped., Mollusca, p. 417, figs. 532, 532a (1852). 
Very common, occurring with Nucula castrensis in all localities yet 
examined. Our shells are certainly the V. ventricosa of Gould, but this 
species was considered by Carpenter to be a variety only of V. borealis, 
Conrad (Amer. Mar. Conch.), and this last is consequently the name 
usually given in our lists. Lately, however, Dr. Stearns’ has figured and 
compared the two forms, and has pronounced them to be distinct. 
Mr. Whiteaves (in Rept. Prog. Geo. Surv. Canada, 1878-79) speaks 
of both forms as occurring in Dr. Dawson’s Queen Charlotte Islands col- 
lection. All the local specimens I have seen are unmistakably ventricosa. 
CARDITAMERA, Conrad. 
42. CARDITAMERA SUBQUADRATA, Carpenter, sp. 
Lazaria subquadrata, Cpr., Rept. Brit. Assoc., 1863, p. 642 (August, 1864); and 
Ann. Mag. Nat. Hist., series 3, vol. xv., p. 178 (March, 1865). 
This shell was first recorded from these waters by Carpenter on the 
strength of a single valve in Swan’s collection ; exact locality not stated. 
Single valves are not uncommon among shells brought by the Indians 
from the western and northern coasts, and I have myself found valves 
on the beaches near Victoria. So far, however, the species has not been 
found here alive. 
MIODON, Carpenter. 
43. MI0DON PROLONGATUS, Carpenter. 
Rept. Brit. Assoc., 1863, p. 642 (August, 1864); and Ann. Mag. Nat. Hist., series 3, 
vol. xiv., p. 424 (December, 1864). 
This is not a common shell with us. A few specimens have been 
found at Victoria, Departure Bay, and at Salt Spring Island, in some 
instances in sand between tide marks, and in others in deeper water. 
Further to the north it appears to be more plentiful, for Mr. 
“Scientific Results of Explorations by the United States Fish Commission 
steamer Albatross. XVII. Descriptions of new West American Land, Fresh- 
water and Marine Shells, etc.” Proc. U. S. Nat. Museum, vol. xiii., no. 813 (1890). 

