Contributions from Walker Museum 



Vol. II. No. 5 



The Flora 



of the Eagle Creek 



Formation 



By RALPH W. CHANEY 



5 The Eagle Creek formation is 

 exposed along the bottom of the 

 Columbia River gorge on the Ore- 

 gon side. It is the oldest forma- 

 tion in the region. 



5 The monograph contains a num- 

 ber of drawings, tables, and nearly 

 a hundred halftones. 



Pafier, $ 1 .00, postpaid $1 .1 



THE UNIVERSITY OF CHICAGO PRESS 



CHICAGO - - - ILLINOIS 



POSITIONS OF ALL KINDS 



Never was the demand so great for qualified 

 teachers and specialists. For ten years we have 

 given our time and energy to this work. Write for 

 our free literature. State qualifications briefly. 



Co-operative Instructors' Association 



Marion 



Indiana 



WATER REPTILES OF THE 

 PAST AND PRESENT 



By SAMUEL WENDELL WILLISTON 



Laic Prnfcssor of Paleontology in the 

 University of Chicago 



Professor Williston, who is widely known as a 

 student of extinct reptiles and as the author of 

 American Permian Vertebrates, which has now 

 become a standard work, presents in this new 

 volume a summary, divested as far as possible of 

 unnecessary scientific details, of our present 

 knowledge concerning the reptiles of the seas, 

 lakes, and rivers of past and present times. 



The numerous illustrations, in large part from 

 the pen or brush of the author himself, include 

 not only living types and twenty-four restorations 

 of e.xtinct forms, but also many figures elucidat- 

 ing the structures and habits of the animals. 



viii-\-252 pages, royal 8vo, cloth; $3.00, postpaid $3.20 



The University of Chicago Press 



Chicago 



Illinois 



American Permian Vertebrates 



By SAMUEL W. WILLISTON 



3HIS work comprises a series of monographic studies, with briefer 

 notes and descriptions of new or little-known amphibians and 

 reptiles from the Permian deposits of Texas and New Mexico. 

 The material upon which these studies are based was for the 

 most part collected during recent years by field parties from the University 

 of Chicago. The book is offered as a contribution to knowledge on the 

 subject of ancient reptiles and amphibians, with such summaries and 

 definitions based chiefly on American forms as our present knowledge per- 

 mits. The work is illustrated by the author. 



■d-\-i46 pages and 38 plates, 8vo, cloth; $2.50, postpaid $2.^0 



THE UNIVERSITY OF CHICAGO PRESS 



C -- . ... . . ILLINOIS 



