
= Poa stamped cloth covers for use in binding Tas 
_Naturatist have been prepared by the publishers, and will be 
sent, ee paid, on receipt of price, 50 cents per volume, 

COVERS FOR VOLUME XXIV. (1890) NOW READY. 

FERRIS BROS., PUBLISHERS, 
N. E. COR. SEVENTH AND FILBERT STREETS, PHILADELPHIA. 

y nopsis of the Families of Vertebrata. 
BY PROF E. D. COPE. 
FERRIS BROS., Publishers, l 
N. E. Cor. Seventh and Filbert SEn È 


All Orders for Estra a Reprint) Copies 
oes Proofs of Texts and Engravi si 

All orders for reprint or extra copies must Ge gi re 
before the number containing the article goes í top 
otherwise ı none yan be furnished. : 

