Canada 
Geological Survey 
Victoria Memorial Museum 
BULLETIN No. 1 
XIV. — New Species of Mollushs from the Atlantic and Pacific 
Coasts of Canada. 
By Wm. H. Dall and Paul Bartsch. 
During the summer of 1910, collections of shells were made at 
Skidegate, Queen Charlotte islands, B.C., by Mr. W. Spread- 
borough, and on the coast of Nova Scotia by Mr. C. H. Young, 
of the Survey. 
The doubtful species of these two collections were submitted 
to us for examination by Prof. Macoun, and in the course of 
determination of the species, several were found to be unde- 
scribed. It was quite unexpected to have a new species from 
the Nova Scotia coast which, during the last half century, has 
been pretty thoroughly explored. 
Among the interesting things not new to science is Mangilia 
crebrieostaia Carpenter, from Skidegate, hitherto represented 
only by a badly worn, unique specimen from Neahbay, Wash- 
ington. 
From Nova Scotia come Crenella faba Fabr., a locality about 
the southern limit of the species; Puncturella princeps Mighels, 
which has long been confounded with the European P. noachina 
Linn6; Campeloma decrisa Say, from Green bay, where it had, 
of course, been washed into the sea from some freshwater source; 
the rare Trichotropis conica Moller, and Ptychalractus ligatus 
Mighels. 
The drawings of the species figured are by Miss Evelyn Mit- 
chell. 
