140 THE NAUTILUS. 
rence in Alberta, at a considerable distance from the line of railway, 
leads me to suppose that it is truly indigenous, and in this opinion I 
am confirmed by Mr. Walker’s observations. 
While on the subject of Planorbis I should like to call attention 
to the occurrence of another shell in southern Alberta (recorded in 
the paper referred to above), namely, Planorbis wmbilicatellus. This 
record seems to have been overlooked by Mr. Vanatta when writing 
on the distribution of P. wmbilicatellus in the last volume of THE 
NAUTILUS. 
By the way: The Ottawa Naturalist is one of our best Canadian 
natural history magazines, and a good many papers on Canadian 
Conchology have been published therein during the last few years. 
Nanaimo, B. C. 
ISAAC LEA DEPARTMENT. 
[Conducted in the interest of the Isaac Lea Conchological Chapter of the Agassiz Associa- 
tion by its General Secretary, Mrs. M. Burton Williamson. } 
At this writing the volume of Transactions is still in California. 
Promptness in forwarding the book will be appreciated by the Gen- 
eral Secretary, as well as by our members whose homes are in the 
eastern States. 
The name of Mrs. V. R. Hayward, Spokane, Wash., is added to 
our Chapter Roll. 
Mr. J.J. White’s gift of shells to our members, mentioned in THE 
Navritvs, is greatly appreciated. 
FOSSILS OF DEAD MAN’S ISLAND. 
[From the report of Hon. Delos Arnold. From the Transactions of the Isaac Lea 
Conchological Chapter for 1896. | 
In submitting my annual report as Secretary of the Fossil See- 
tion of the Chapter, I have to regret that so little progress has been 
made during the past year along the lines of this Section of the 
Chapter. 
-While the work during the past year, so far as the main concho- 
logical work is concerned, is very gratifying, showing, as they do, 
an increasing interest in the study of the science and a commend- 
able activity in the collecting of specimens, the Fossil Section has 
