THE NAUTILUS. lil 
— — —— _ ES 
BxXCHAN GES. 
, NOTE. A RED MARK IN THIS SPACE SHOWS THAT YOUR SUB- 
} SCRIPLION TO NAUTILUS WILL EXPIRE WITH THIS NUMBER. 
=—— 
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. 
MRS, JAS. E. TANNER, 17 Lincoln Ave., Cortland N.Y.,hasa few sea shells to exchange 
for others. 
SS OE 
FOR DISPOSAL :— Land, Fresh-Water, and Marine Shells from Europe, India, Cuba, 
Mexico, South Africa, and Australia.— All good specimens, correctly named, and localized. 
WANTED North American Shells— English specimens offered in exchange. (No Post 
Cards.) Address to 
DR. J.T. T. REED, 
Ryhope, Sunderland, England. 
Cones’ New Key to North American Birds. 
Revised Edition containing a fullaccount ofevery known species, 
8)0 pages, 561 illustrations. Bound in cloth or flexible leather. $7.00 
Illustrated prospectus for 4c. postage. I. C. Greene, Fitchburg, Mass. 
WHeSr COAST SHELLS. 
By Prof. 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 
frontispiece is a hand-painted engraving of the very rare 
SQ and beautiful Surcula Carpenteriana, Gabb. 
y ]) ‘Yo aid in the study of Shells, the pronunciation of the 
“y ) Latin names is indicated, and a Glossary, Key, Biographi- 
cal Index of Naturalists, and a Check List are added. 
Beautifully printed and bound, Price, postpaid, $1.75. 
Helix (Aglaia) fidelis, Gray, Oregon. SAML. CARSON & CO., Publishers, 208 Post St., San 
Francisco. 
wy \ WS 
\ Nv 
Please mention this paper. 
THE WEST AMBRICAN SCIBNTIST 
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, 
qin (© Sai V eee 
A monthly journal especially for 
STUDENTS AND LOVERS OF NATURE. 
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. 
' &G§-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 7e Observer. 
It is an unique, original paper. ‘‘ Keep Your Eyes Open,” is its motto. 
There is no cther 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: BDWARD F. BIGELOW, Portland, Conn. 
SPECIAL NOTICE." 
In order to increase the growing circulation of THE Nauti us 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. 
