Notices of Exchanges, not exceeding six lines in length, will be 

 inserted Free of Charge. 



The undersigned has for Exchange : — 



Land Shells from Australia, Central and Western Polynesia; 

 also the new and rare species from New Guinea and New Cale- 

 donia. The dredged Marine species of Port Jackson correctly 

 named. 



For copies of Papers, especially on Shells, Mollusca, and the 

 Geographical distribution of Animals. East Indian and South 

 American Land Shells taken. 



JOHN BRAZIER, C.M.Z.S., &c., Curagoa House, 



II, Windmill St., SYDNEY, N.S.W. 



:o: 



Mr. J. H. THOMSON, C.M.Z.S., of New Bedford, 

 Massachusetts, U.S.A., would be glad to exchange North 

 American Land Shells for any of his desiderata in non-operculate 

 Helicacea. 



:o: 



A good price given, either in money or exchange, for any of 

 the following Shells — British specimens : — 



Sphcerium lacustre var. rotunda, Limncea peregra var. picta, L. 

 peregra var. scalariformis, Ancylus lacustris var. albida, Helix rupestris 

 var. uiridescenti-alba, Balia perversa var. uiridiila, Glausilia paruula vars. 

 aibida and destrorsa, C bipli'cata var. Nelsoni, and sinistral specimens of 

 Limincea stagnalis, Helix uirgata, Cochlicopa tridens, and Acme lineata. 



PHILIP B. MASON, Burton-on-Trent. 



BOOKS RECEIVED. 



The American Naturalist, edited by Prof. A. S. Packard, jun. — 

 vol. xiii., Jan., Feb., March, April, May, June, July, Aug., 

 Sept. and Oct., 1879, 8vo. [The Editor. 



Bulletino della Societa Malacologica Italiana. — Vol. v., 1879, 

 fogli 1-6. [The Society. 



Proceedings of the Linnean Society of New South Wales. — Vol. 

 iii., Parts I., II. and III., 305 pages and 21 plates, 1878 and 

 1879. [The Society. 



Notice of some shells dredged by Capt. St. John, R.N., in Korea 

 Strait. — By J. Gwyn Jeffreys, LL.D., F.R.S. — extracted from 

 the Linnean Society's Journal — Zoology, vol. xiv., pp. 418 to 

 423. [The Author. 



Journal of the Royal Microscopical Society — Feb., April, May 

 and June, 1879, vol. i., Nos. i, 2, 3 and 4, 8vo., pp. 324 and 

 8 plates. [The Society. 



Transactions of the Watford Natural History Society and Hert- 

 fordshire Field Club— Vol. i., for 1875-7 and vol. ii., parts 

 I to 4. [The Society. 



W. Wesley's Natural History and Scientific Book Circular — No. 

 37 (Ethnology, Mammalia, Botany, Conch ology, Entomology, 

 Ornithology, &c.), 1879, [The Publisher. 



