BOOKS RECEIVED. 



Scientific Results of the Exploration of Alaska. Article IV. 

 Report on the Limpets and Chitons of the Alaskan and 

 Arctic Regions, with descriptions of genera and species 

 believed to be new. — By W. H. Dall, Dec. i6, 1878, pp. 6j 

 to 126 and 5 plates, 8vo. [The Author. 



Muscatine Daily Tribune, April 16, 1878 (report of a paper on 

 the Geology of Muscatine. — By Prof. F. M. Witter). 



[The Author. 



Bulletino della Societa Malacologica Italiana. — Vol. IV., 1878, 

 fogli I— 14. [The Society. 



Proceedings of the United States National Museum, 1878. — 

 Descriptions of new forms of mollusks from Alaska contained 

 in the collections of the National Museum. — By W. H. Dall, 

 8vo., pp. 16. [The Author. 



BIBLIOGRAPHY. 



Under this heading it is desired to keep up a continuous 

 record of contemporary conchological literature. It is hoped that 

 authors and societies will assist by furnishing copies of their 

 publications. 



FOR SALE-Price £175, 



A very fine and complete COLLECTION OF UNIVALVES, including about 

 8,000 species, of whicfi 7,800 are Marine d 1,200 Land & Freshwater. 



The larger species are usually only represented by one speci- 

 men, and the smaller ones by two or more, in Glass Boxes. 



Outline of the Collection. 



Murex tenuispina (2), palma roscB, and 37 others. Valuta 

 cymbiola, rutila, pallida, volvacea, ficsiformis, fulgetrum, angulaia^ 

 and 22 others. Mitra, about 100 species. Cyprcea aurora^ 

 utnbilicata, sulctdeniata, exusta, tessellata, Capensis, and about 120 

 other species. Harpa iinperialis (2) and 6 others. Triton^ 

 Persona, Ranella, about 80 species. Marginella, 50 species. 

 Terebra, 50 species. Nassa, about 120 species. Columbella and 

 Engina, 80 species. Comis, about 100 species. Oliva and 

 Ancillaria, about 60 species. Turbinidm and TrochidcB, about 

 175 species. 



Land Shells. 



Helix, including Nanina and Cochlostyla, about 430 species. 

 £ulinius, Bulimulus, and Buliminus, about 80 species. Clausilia^ 

 90 species. Achatinella and Fartiila, about 120 species. Streptaxis^ 

 5 species. Melaniada and Streponiatida, about no species. 

 Faludina, Tanalia,Ampullaria,&'c., about 40 species. Cyclostoma, 

 Helicina, Cataulus, Cyclophorus, and other operculated land shells 

 ^many genera) about 130 species. 



Apply — British Naturalists' Agency, 



St. Ann Street. LEEDS. 



