Notice. 



Full price will be paid for clean, perfect copies of Nos. i, 

 4, and 5 of this Journal, at the Oflice, St. Ann Street, Leeds. 



A collection of 50 species of Land shells, in exchange for a simi- 

 lar number from other countries. — Address M, Office of Journal, 

 St. Ann Street, Leeds. 



British land and freshwater shells offered in exchange for foreign 

 i5pecies, especially American. — Harry Nelson, 65, Kreehold St., 

 York Road, Leeds. 



Collections of twenty species of British Limnseidoe, in exchange 

 for Limnceidce of any other country. — W. Nelson, Duke St., Leeds, 



Clausilia biplicata, Gochlicopa tridens. Helix aculeata, H. Car- 

 tusiana, rupestris, &c., for other foreign Helicidce. — J. W. Taylor, 

 Leopold Square, Leeds. 



BOOKS ESCEIYBD. 



The American Naturalist. — Edited by Prof A. S. Packard, junr.— 

 Jan — April, 1877, 8vo., pp. 256. [The Editor. 



Astor Library, New York. — 28th Annual Report, 8vo., pp. 16. 



[The Trustees. 



Descriptions of six new species of shells, from the collections of the 

 Marchioness Paulucci and Dr. Prevost. — By G. B. Sowerby 

 junr., (From P.Z.S., Nov., 1876), 8vo., pp. 4 and plate. 



Jahrbucher der Deutschen Malakozoologischen Gesellschaft. — Edi- 

 ted by Dr. W. Kobelt. — Jan., 1877, 8vo., pp. 96 and plate. 



[The Editor. 



On some new and peculiar Mollusca of the Eulimidae and other 

 families of Gastropoda as well as of the Pteropoda, procured 

 in the 'Valorous' expedition. — -By J. Gwyn Jeffreys, LL.D., 

 F.R.S., &c.— April, 1876, 8vo., pp. 22. [The Author. 



On some new and remarkable North-Atlantic Brachiopoda. — By J. 

 Gwyn Jeffreys, LL.D., F.R.S., &c.— Sept., 1876, 8vo., pp. 6. 



[The Author. 



Scientific Results of the Exploration of Alaska, by the parties under 

 the charge of W. H. Dall, during the years 1865 — 1874, 8vo, 

 pp. 45 and 10 plates. 



[Prof W. H. Dall. 



On the Vitality of certain Land Mollusks. — By R. E. C. Stearns. — 

 8vo., pp= 2 and plate. [The Author. 



All communications for the Journal, Books for Review, and Advertisements, 

 to be sent to J. W. Taylor, St. Ann Street, Leeds, to whom also Pobt-Office 

 Orders should be made payable. 



