[ray LoR] MARINE MOLLUSCA 93 
MEGATEBENNUS, Pilsbry. 
327. MEGATEBENNUS BIMACULATUS. Dall. sp. 
Fissurellidea bimaculata, Dall, Amer. Jour. Conch., vol. vii., p. 132, Dave tion 
(November, 1871). 
This little shell seems to be very rare in British Columbia. Dr. 
Dawson dredged two dead specimens in Houston-Stewart channel, Queen 
Charlotte Islands; Dr. Newcombe found a few Specimens living at the 
roots of Macrocystis in Clayoquot Sound ; and I have a single dead shell, 
which [ picked up on the beach at Victoria. 
POLY PLACOPHORA. 
CHITONIDA. 
The Chitons of the Pacific coast are numerous and very interesting 
5S 
and as a consequence they have received a good deal of attention at the 
. 5 à + : 2Q y à . € lc 
hands of conchologists. Drs. Carpenter, Dall, and Pilsbry, have all 
written at length upon this subject and it will be sufficient for present 
purposes for me to refer to their papers! 
and to limit my own remarks 
to a simple record of the distribution of the various species within our 
province. 
I may say that while there are still some of the smaller forms about 
which we are in doubt the names of the majority of our Chitons are, I 
believe, correctly determined. Numerous specimens of all but three of 
the species admitted to this list are in my own collection. 
LEPIDOPLEURUS, Risso. 
328. LEPIDOPLEURUS CANCELLATUS, Sowerby, sp. 
Chiton cancellatus, Sby., Conch. IL, tigs. 104-105 (1839). 
This species is of Common occurrence under stones between tides and 
it has also been dredged not unfrequently near Victoria and in Departure 
Bay, attached to stones and broken pieces of shell. It was also obtained 
in this way by Dr. Dawson at Alert Bay and Freshwater Bay. 
L. cancellatus resembles, very nearly, several other species of the 
same genus, and I am not quite sure that all our Vancouver specimens 
really belong to the present species. 


' The most important are : 
Carpenter: Supplementary Report to the British Association, 1863. 
Dall; Report on the Limpets and Chitons of the Alaska and Arctic regions, &c. 
(See note under Acmæa patina.) 
Pilsbry ; Manual of Conchology, vol. xiv. 
The synonymy of our species will be found exhaustively treated in the two last 
named works. 
