BOOKS RECEIVED. 



Tiddskrift for populsere Fremstillinger af Naturvidenskaben, 

 udgivet af C. F. Lutken og Eug. Warming, iste and 2det 

 Haefte, 1880. [The Editors. 



Bulletin of the Geological and Geographical Survey of the Ter- 

 ritories. — The So-called Two-ocean Passes, by F. V. Hayden. 



[The Author. 



Preliminary report of the Field-work of the Survey for 1878, by 

 Prof Hayden. [The Author. 



Fossil Forests of the Volcanic Tertiary formation of the Yellow- 

 stone National Park, by W. H. Holmes. [Prof Hayden, 



Jura-Trias section of Southeastern Idaho and Western Wyoming, 

 > by A. C. Peale, M.D. [Prof Hayden. 



Horizons of extinct Vertebrata of Europe and N. America. — 

 I. — The relation of the Vertebrata of Europe and N. 

 Ameiica; 2. — Observations on the Faunse of the Miocene 

 Tertiaries of Oregon, by E. D. Cope. [Prof Hayden. 



Sketch of the Origin and Progress of the U. S. Geological and 

 Geographical Survey of the Territories, by Prof Hayden. 



[The Author. 



Preliminary Report of the Field-work of the U. S. Geological and 

 Geographical Survey of the Territories, for the season of 

 1877. [Prof Hayden. 



The Naturalist, June, 1880. [The Editors. 



The American Naturalist, June, 1880. [The Editor. 



Nachrichtsblatt der Deutschen Malakozoologischen Gesellschaft, 

 May, 1880, No. 5. [The Editor. 



Zoologischer Anzeiger, herausgegeben von Prof J. Victor Carus, 

 Leipzig, No. 57, June 7th; No. 58, June 21st, 1880. 



[The Editor. 



Wesley's Natural History and Scientific Book Circular, No. 42. 



[The Publisher. 



Proceedings of the Academy of Natural Sciences of Philadelphia, 

 parts I, 2 and 3, pp. 490 and 15 plates, 1879. [The Academy. 



Science Gossip, No. 187, July i, 1880. [The Publisher. 



Eleventh Annual Report of the U. S. Geological and Geographical 

 Survey of the Territories, embracing Idaho and Wyoming, 

 being a report of progress of the exploration for the year 

 1877, ^y F. V. Hayden, 1879, pp. 720, 10 plates and 76 maps. 



[The Department of the Interior. 



The Naturalist, edited by C. P. Hobkirk, F.L.S., and G. T. 

 Porritt, F.L.S., No. 60, July, 1S80. [The Editors. 



The American Naturalist, vol. xiv., No. 7, July, 1880, edited by 

 Prof A. S. Packard, junr. [The Editor. 



Transaction of the Watford Natural History Society and Hert- 

 fordshire Field Club, edited by John Hopkinson, F.L.S., 

 F.G.S., vol. iii, parts 7 and 8, April and June, 1880. 



[The Society. 



