80 
THE - CONCHOLOGISTS’ : EXCHANGE 
Reports of Natural History Society pro- 
ceedings especially desired. 
A. N. Prentis, Professor of Botany in Cornell 
University, has sailed for Europe, to carry on 
the advanced study of his specialty. 
Corrections: In No. 11, page 67, right hand 
column, r5¢/ line from bottom read wzass for 
moss. Same number, under New Localities, the 
word States in report of Carychium exiguum, 
should be Sade. 
The Humboldt Natural History and Arche- 
logical Society was organized and incorporated 
April 16th last, at Eureka, Cala., with the 
following board of directors and officers: T. B. 
Brown, President; T. F. Cornan, Secretary; 
Prof. E. H. Whipple, R. B. Powell, Robert 
Gunthur.—West American Scientist (May). 
A SUGGESTION TO OUR YOUNG 
FRIENDS. 
BY ADAM LOOFBET. 
Every student, especially the young begin- 
ner, should have an aquarium. This need 
not be an expensive affair. A large glass jar 
such as is used by confectioners is very well 
suited to this purpose. Any deep dish or wide- 
mouth bottle will answer, but glass is much 
preferable as it enables observations to be taken 
on all sides, as with many of our Mollusca,the 
foot is the most striking characteristic of the 
animal. To prepare your aquarium, cover 
the bottom about an inch deep with clean sand 
and gravel and fill with clear water. If for 
fresh-water specimens, get your supply from a 
brook or pond, as it contains minute particles 
upon which the animal feeds. Allow about 
fifteen shells of average size to each quart of 
water. Keep your aquarium in a shady place 
but not in a close room. Tt will probably 
not be necessary to change the water as any 
impurities will be devoured as rapidly as 
formed. 
\ 
PUBLICATIONS RECEIVED. 
On Some Marine Invertebrata, dredged 
or otherwise collected by Dr. G. M. 
Dawson in 1885, on the coast of British 
Columbia; with a Supplementary List of a 
few Land and Fresh-water Shells, Fishes, 
Birds, etc., from the same region, by J. F. 
Whiteaves, F. G.S.—From the Transactions 
of the Royal Society of Canada, Vol. IV, 
Sec. 4, 1886.” 
This valuable contribution to Science by 
Prof. J. F. Whiteaves, who has worked so 
nobly in the British North American field, 
comes none too soon, and adds materially to 
our knowledge of the Natural History of 
3ritish Columbia. 
Annual Report of the Trustees and List of 
Members of The American Museum of 
Natural History, New York City, for the 
year 1886-7. 
Received from A. Woodward, Librarian, to 
whom we are indebted for many valued favors. 
We thankfully acknowledge the receipt of 
the following publications: The Canadian 
Entomologist, Port Hope, Canada.—The West 
American Scientist, San Diego, Cala.—The 
Microscopical Bulletin and 
Philadelphia.—The Open Court, Chicago, III. 
—Common Sense, Mexico, N. Y.—The Ex- | 
changers’ Monthly, Jersey City, N. J.—The 
Eclipse, Pittsburgh, Pa—The Young Geolo- 
gist, Oskaloosa, Ia.—The Blade, Mendota, 
Tlls.—The Shelbyville Star, Shelbyville, N1.— 
National Educator, Allentown, Pa,—The En- 
terprise, Towson, Md. 
Too LATE FOR CLASSIFICATION. 
OFFERED:—Fine specimens of Helix Traski, 
Newc. in exchange for any North American Helices 
not in my collection. G.W.MICHAEL, Jr., Morro, 
S. L., Obispo, Co. Cala. 
Science News, — 
