THE JOURNAL OF EXPERIMENTAL ZOOLOGY is issued 

 quarterly. A volume consists of four numbers, containing from 100 

 to 200 pages each, with numerous illustrations. 



PRICE OF SUBSCRIPTION PER VOLUME 



(PAYABLE IN ADVANCE) 



To subscribers in the United States, Canada and Mexico, $5.00 

 To subscribers in other countries - 5.50 



Price of single copies - - 2.00 



These prices are net and under no condition subject to discount 



Remittances should be made by Postal Money Order (Mandat de 

 Poste, Postanweisung') or by draft on New York, payable to THE 

 JOURNAL OF EXPERIMENTAL ZOOLOGY. 



Address all communications to 



THE JOURNAL OF EXPERIMENTAL ZOOLOGY, 

 N. E. Cor. Wolfe and Monument Streets, 



Baltimore, Md.,'lJ. S. A. 



