THE NAUTILUS. iil 
EXCHANGES. 
As a Premium, each subscriber is allowed an exchange of 25 words, including address. 
Exchanges printed in this column for 25 cents per 25 words, including address. Notices over 
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- Offered:—N.A Shells. Also shells from the Balearic Islands, and Mediterranean, for N.A. 
Shells. Helices and Unios especially desired. JEROME TROMBLEY, Petersburg, Mich. 
Wanted :—Tryon’s Systematic Conchology. Strong Exchange given innamed shells : mostly 
marine, including 16 species Cyprza. also exchange in shells. 
Jz = a ae F.C. BROWNE, Framingham, Mass. 
Offered :—Numerous Foreign Shelis for land and fresh-water shells of Central and South 
America. : ¢& F. ANCEY, Fort National, Algeria, Africa 
~ L have over 2000 shells to exchange for Olivas, Cones, Cyprzeas and Strombus. ‘F pines 
ee Rev. JOHN WALTON, Lakeside, Wayne Co., N. Y. 
_ “Offered:—Land and Marine Mediterranean Shells— Wanted: — Books on Botany, Cenchology, 
Geology, Entomology—Coleoptera and Lepidoptera or Hemiptera.” 
ALFRED CARUANA GATTO, B.A ,M.C.S. 59Str. Levante, Valletto, Malta. 
CONES’? NEW KEY TO NORTH AMERICAN BIRDS.-— Revised edition con- 
taining a full account of every known species, 890 pages, 561 illustrations. Bound in cloth or 
flexible leather,$7.50 Illustrated prospectus for 4c postage. I C. GREENE, Fitchburg, Mass. 
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meee Ole Sa rteaaity, Sop. 
A Monthly Journal devoted to Science in all its Branches. 
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THE CANADIAN BN TOMOLOGIST. 
Published by the Entomological Society of Ontario. 
SAN 13's SLWIB 
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BBIStaay Wy isan) JNM bap Se OA IN SCrimann araySae 
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