ELEMENTARY NATURAL HISTORY SERIES 



-5f -5c -5v -5f 



Established for the purpose of furnishing, at small cost, 

 Reliable information on local subjects of natural history . 



No. i 



Chautauqua Lake Shells : Kinds, Distribution, Characteristics ; how and 

 when collected ; all described aud well illustrated. Specially ap- 

 plicable to southern Chautauqua, Cattaraugus and Allegany counties. 

 8vo, 44pp.) 29 figs., map, plates. 

 Price: Postpaid', 30 cts. 



No. % 



Key to the Upper Devonian of Southern New York : Giving detailed inform- 

 ation regarding the Geology of the vicinities of many of the more im- 

 portant High Schools and other institutions of learning in the 

 south and south-western part of the State. 



8vo> 1 3 full page plates, 124 figures of common fossils. 



Price : Paper, Postpaid, 28 cts; Flexible Board, Postpaid, 35 cts. 



Other Numbers similar to No. 2 but covering the remaining portions of 

 the State ; together with an Introductory Text-Book of Geology zvritten 

 especially for the students of New York State,— now in course of 

 preparation. 



Address all communications regarding the above mentioned works to the 

 CORNELL CO-OPERATIVE SOCIETY, 



CORNELL UNIVERSITY, 



Ithaca, New York. 



