32 ROYAL SOCIETY OF CANADA 



31. NucuLA TENiis, Montagu, sp. 



Aicn tennis, Mont., Test. Brit., Suppl . )>. 5(i. pi. xxix.. fig 1 (1H()«). 



Occurs Avilh the last named species, but is not quite so common. 



LEDA, Schuniaclier. 



.32. Leda fossa, Baird. 



Proc. Zool. Soc. Lmidon. l.S(W, p. 71. 



This species was described from a single specimen taken by Dr. 

 Lyall in Esquimalt Harbour. It Avas also represented by a single 

 specimen in Dr. Kennerley's collection. 



Though JO. fossa is ver}^ abundant in the " Leda clay" of Victoria, 



I have never succeeded in finding recent specimens. Mr. Whiteaves 



records with a query "a single worn valve," Duncan Bay, V. I. (Dr. 



Dawson.) 



33. Leda minuta. Miiller, sp. 



Area niinafa, Miill., Prodr. Zool. Dan., p. 247, no. 298.5 (1776). 



This is the common Leda at Victoria and nortliward to the Queen 

 Charlotte Islands. It is much smaller than L. fossa, and its sculpture is 

 quite different. I have not yet found this species in the Leda clay. 



34. Leda acuta, Conrad. 



= ? i. ccelata, Hinds. 

 — 1 L. cuneata, Sby. 



There is certainly a third species of Leda in our seas, but I am not 

 sure what it should be named. Mr. Whiteaves, in his paper on the 

 Queen Charlotte Islands Mollusca, records a single valve from Houstoit- 

 Stewart Channel as L. cmlata. Hinds. 



In his next paper (Trans. Eoy. Soc. Can., 1886) he refers ten shells 

 of the same species from Quatsino Sound to L. acuta, but suggests, 

 quoting Drs. Dall and Cooper, that acuta, Conrad, coslafa, Hinds, and 

 cuneata, Sbj'., are one and the same s])ecies. I have not access to the 

 literature or specimens necessary to a decision on such a ]>oint, and 

 therefore follow Whiteaves in adopting the name L. acuta, but I may 

 say that the shells from Quatsino Sound above mentioned are not con- 

 specific, in my opinion, with some received as L. acuta from California 



(Hemphill). 



YOLDIA, Moller. 



35. Yoldia thraci.kformis. Storer, sp. 

 N'licula ihrari(t'formis,StoYiir, Bost. Jour. Nat. Hist., vol. ii., no. 1, p. 122, Hgure (183S>. 

 Two small living specimens, P'orward Inlet. Quatsino Sound, Dr. 

 Dawson. 



