NOTICE. 



Those Subscribers who have not yet remitted their Subscriptions 

 are specially requested to do so without delay. 



EXCHANGE. 



Wanted. — Land shells from S. Europe, the E. Indies, &c. Offered, 

 S. and E. African ; also land shells from the Spanish Main, Hayti, Cuba 

 and Lesser Antilles. — J. S. Gibbons, 2, Belmont Terrace, South- 

 ampton. 



Collections of 20 species of British Limnseidse, in exchange for 

 Limnseidoe of any other country. — W. Nelson, Duke Street, Leeds. 



To American Conchologists. — Melanise and other operculated 

 freshwater shells desired in exchange for British Land and Freshwater 

 Shells. — J. Whithwam, Cross Lane, Marsh, Huddersfield, England. 



BOOKS RECEIVED. 



Smithsonian Report, 1876, 8vo., pp. 488. [The Institution. 



Announcement of the discovery of the Satellites of Mars, 1877, 4to, 

 pp. 4. [The Smithsonian Institution. 



On two new British Nudibranchiate Mollusca, by Rev. A. M. Norman, 

 M.A., 1877, 8vo., pp. 3. [The Author. 



The American NaturaUst. — Edited by Prof. A. S. Packard, jun., Nov.- 

 Dec, 1877, 8vo. [The Editor. 



The Naturalist.— Edited by C. P. Hobkirk and G. T. Porritt, F.L.S., 

 Dec, 1877, 8vo. [The Editor. 



Jahrbiicher der Deutschen Malakozoologischen Gesellschaft, Oct., 1877, 

 8vo., pp. 90 and 4 plates. [The Editor. 



Proceedings of the Academy of Natural Sciences of Philadelphia, 

 1872-74, 8vo., pp. 1086 and 28 plates. [The Academy. 



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Quarter Page 5s. Od. 



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Line Os. 6d. 



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