BOOKS RECEIVED.— O?;//. 



Report of the U. S. Geological Survey of the Territories, vol. ii., 

 Cretaceous Vertebrata, by Prof. E. D. Cope, 4to., pp. 302 

 and 57 plates. [Prof. Hayden. 



U. S. Geological Surxey of the Territories, vol. vii., "Tertiary 

 Flora," Leo Lesquereux, 4to., pp. 366 and 65 plates. 



[Prof Hayden, 



U. S. Geological Survey of the Territories, Illustrations of Creta- 

 ceous and Tertiary plants, 4to., 26 plates. [Prof Hayden. 



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

 inserted Free of Charge. 



The undersigned is willing to Exchange dredgings of mud 

 and sand containing Foraminifera and Diatomaceae, &c., from 

 the Coast of Australia; also Land and Marine Shells from Austra- 

 lasia. For copies of Papers especially on Shells, Mollusca, and 

 the Geographical distribution of Animals, will be most gratefully 

 accepted by 



Your obedient servant, 

 JOHN BRAZIER, C.M.Z.S.,&c., Cura9oa House, 



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

 Corresponding Member of the Zoological Society of London, 

 Member of the Royal and Linnean Societies of N.S.W., Corres- 

 ponding Member of the Royal Society of Tasmania. 



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. 



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

 the following Shells— British specimens: — 



Sphcen'um lacustre var. rotunda, Limnoaa peregra var. picta L 

 peregra var. scalaiiformis, Ancylus lacustris var. albida, Helix rupe'stris 

 var. uin'descenti-alba. Balia perversa var. viridula, C/ausi/ia paruu/a\ars, 

 albida and dextrorsa, C. biplicata var. Nelsoni, and sinistral specimens of 

 Limncea stagnalis, Helix uirgata, Coohlicopa tridens, and Acme lineata. 

 PHILIP B. MASON, Burton-on-Trent. 



TO COLLECTORS OF FOREIGN SHELLS. 

 A gentleman in Tasmania is anxious to correspond with col- 

 lectors who can send him land shells from Siam, China, Cochin 

 China, and Japan, for Shells from Tasmania, Australia, and South 

 Sea Islands. Address:— Lieut. C. E. BEDDOME, I.N., Hill- 

 grove, Brown's River Road, HOBART TOWN, Tasmania. 



