The American Naturalist 



NEW YORK : Sub-Station 84 



Garrison, N. Y. 



FOR SALE 



ARCTIC, ICELAND and GREENLAND 

 BIRDS' SKINS, 



TENTH EDITION. 



THE MICROSCOPf 



an introduction to Microscopic Methods and to Histolc 

 by Simon Hbnry Gage, of Cornell University. " 

 360 large octavo pages and above 250 figures in th 

 and fully revised edition. Price $2.00, postpaid. 

 COMSTOCK PUBLISHING CO., Ithaca, J 



To Ornithologists 

 and Museums 



W. F. H. ROSENBERG 

 Importer of Exotic Zoological Specimens 



57, HA VERSTOCK HILL 

 London N. W., ENGLAND 



Begs to announce the publication of a new Price List 

 (No. 17) of BIRD SKINS. This catalogue con- 

 tains nearly 6,000 specie*, and is the largest and 

 most complete price list of birds ever published. It 

 is arranged in systematic order with authors' names 

 indications of localities, and an index to Families, 

 [t will be sent gratis and post free on application, as 

 will the following lists: 



No. 14, Mammals; No. 15, Bird's Eggs ; No. 16 



Largest stock in the world of specimens ii 

 branches of Zoology. Specimens sent onappn 

 Please state which lists are required. 



University of Colorado 



Mountain Laboratc 



Courses in Field Biology (a 

 plant), Ecology, Systematic 

 ology of Ponds and Streams, 

 work for undergraduates and 

 Daily Field excursions. 



The laboratory is at Tolland, 

 the Rocky Mountains at 

 8,889 feet. Climate cool and 

 Fees and expenses moderate. 



For pamphlet address the 



Dr, Francis Rami 



University of Co 

 BOULDER COLOR/* 



