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Wanted.— Young developing specimens of Pelecypods and Gasteropods for the study of shell 
growth, Offered—Similar material. ROBERT T. JACKSON, 89 Charles St., Boston, Mass. 
Wanted.—Conchological works and showy Marine Shells.—Offered L. & F. W. Shells of this 
locality ; also Fossils for Shells. Send lists and get mine. W. L. MCDANIEL, Box 371, 
Mineola, Wood Co., Texas. 
Offered :—Random Notes on Natural History (odd numbers or complete volumes) for Num- 
bers 1 (postal card), 3, 4, and 5 of Vol. 1, and No. 3 of Vol. 2, Conchologists’ Exchange, 
or for rare shells. Address, W. D. AVERELL, Mt. Airy, Phila. 
~ West Coast Shell offered in exchange for others. i IDA M. SHEPARD, Long Beach, Cala. 
ROSSTL FRANS 
From Mazon Creek, Grundy Co., Ills., for sale or exchange for Marine Shells or Corals. 
Only good shells offered or wanted. 
J. C. CARR, Cashier Grundy Co. Nat. Bank, 
MORRIS, ILLS. 
Cones’ New Key to North American Birds. 
Revised Edition containing a fullaccount ofevery known species, 
890 pages, 561illustrations. Bound in cloth or flexibleleather, $7.50 
Illustrated prospectus for 4c. postage. I. C. Greene, Fitchburg, Mass. 
WASH SD (GON Sah) SiS blade says 
By Pror. Jostau Keep, Mills College, California. 
A familiar description of the Marine, Fresh-Water and 
Land Mollusks, found in the United States, West of the 
Rocky Mountains. 182 Illustrations, 230 pages. The 
S\ frontispiece is a hand-painted engraving of the very rare 
\ and beautiful Surcula Carpenteriana, Gabb. 
To aid in the study of Shells, the pronunciation of the 
S Zj/ / Latin names is indicated, and a Glossary, Key, Biographi- 
ili ees 7-2 cal Index of Naturalists, and a Check List are added. 
Beautifully printed and bound, Price, postpaid, $1.75. 
Flelix (Aglaia) fidelis,Gray, Oregon. C.T. DILLINGHAN, 718 Broadway, New York City. 
Please mention this paper, 
JG sshd sh WAI Sy YNaMbs sh Shy AIN) fSle@anaany ARS 
Will hereafter be published by the undersigned. Mr. CHARLES R. ORCUTT of San Diego 
will continue as its editor. 
First issued as a four-page monthly in 1884, this magazine has steadily grown in merit and 
popular favor until it is now in the forefront of the scientific magazines of the country. 
SAMUEL CARSON & CO. 
Publishers, Booksellers and Stationers, Wholesale and Retail, 
208 Post St., San Francisco. 
THE OBSERVER: 
A monthly journal especially for 
SUDDEN iS AND: LOVERS OF- Net U RE: 
With miscellaneous reading of value and interest to all. Has departments of Botany, Zoology, 
Astronomy, Geology, Ornithology, Entomology, Microscopy, etc., each department being in 
charge of a specialist. 
4@5=Do you love the great out-door world, do you enjoy roaming over fields and through the 
woods, are you interested in the birds, flowers, insects, rocks, etc., do you wish to know more 
of the wonders and beauties of nature? Have you a microscope or wish to get one, or are you 
interested in chemical or physical experiments? Do you enjoy good, interesting miscellaneous 
reading? Ifso, then subscribe for 7he Observer. 
It is an unique, original paper. ‘*‘ Keep Your Eyes Open,”’ is its motto. 
There is no other paper of the same character published. ‘‘ It supplies a need’’ is the 
unanimous verdict. Subscription only 50 cents a year. Send for sample copy. 
Address: EDWARD F. BIGELOW, Portland, Conn. 
Seis OwiyN IE INj@Meite@eashs 
In order to increase the growing circulation of THe NautTivus in Foreign Countries, a limited 
number of copies will be sent to resident students in Exchange for desirable named shells. 
Address, THE NAUTILUS, Mt. Airy, Philadelphia, Pa. 
