62 ROYAL SOCIETY OF CANADA 
198. Beta TREVELYANA, Turton, sp. 
Pleurotoma Trevellianum, Turton, Mag. Nat. Hist., vol. vii., p. 351 (1834). 
199. BELA EXARATA, Müller, sp. 
Defrancia exarata, Moller, Index Moll. Grœæl., p. 12 (1842). 
200. BELA CREBRICOSTATA, Carpenter, sp. 
Mangilia crebricostata, Cpr., Rept. Brit. Assoc., 1863, p. 658 (August, 1864); and 
Ann. Mag. Nat. Hist., series 3, vol. xv., p. 29 (January, 1865). 
201. BELA TABULATA, Carpenter, Sp. 
? Mangilia tabulata, Cpr., Rept. Brit. Assoc., 1863, p. 658 (August, 1864); and Ann. 
Mag. Nat. Hist., series 3, vol. xv., p. 29 (January, 1865). 
202. BELA VioLACEA, Mighels and Adams, sp. 
Pleurotoma violacea, M. and Ad., Proc. Bost. Soc. Nat. Hist., vol. i., p. 50 (Novem- 
ber, 1841); and Bost. Jour. Nat. Hist., vol. iv., no. i., p. 51, pl. iv., fig. 21 
(January, 1842). 
The first named, B. fidicula, is the common species with us, and 
represents the European B. turricula, Montagu. It is reported from the 
Queen Charlotte Islands, Queen Charlotte Sound and Johnston Straits 
(Dawson), and several Vancouver Island localities. 
The next three species are very nearly allied to each other. 
B. excurvata was described from a single specimen from Puget 
Sound (Kennerley). 
B. Trevelyana is added, by Mr. Whiteaves, on the strength of one 
dead shell dredged in Virago Sound by Dr. Dawson. 
B. exarata is the name given by Dr. Dall to shells from Comox and 
Victoria sent to him by Dr. Newcombe for determination. 
It seems to be just possible that our British Columbian specimens, 
thus variously determined, may all belong to a single species, namely 
that intended by Carpenter in his description of B. excurvata, which is 
said to be “like Trevelliana” and which may or may not be equivalent 
to Müller’s earlier B. exarata. 
B. crebricostata (specimens identified by Dr. Dall) is rare at Victoria 
and we have not found it elsewhere. The type specimen was collected 
by Swan. 
B. tabulata (specimen also identified by Dall) is from Victoria, but 
is also on record from Queen Charlotte Sound (two specimens). Mr, 
Whiteaves, however, in writing of these specimens remarks “ perhaps a 
