


, 1905 
MARCH 
NO. 459 
XXXIX, 
VOL 


t k 
the Structure of the Vascular Cyl 
THE 
AMERICAN 
NATURALIST 
A MONTHLY JOURNAL 
DEVOTED TO THE NATURAL SCIENCES 
IN THEIR WIDEST SENSE 
CONTENTS 
I. The Anatomical Changes in 
n of Catalpa . 
Origin of Amber 
to the Hybridi 


P. HENDERSON 147 

D 
. A. CUSHMAN AND W. 
t's British Freshwater - 
ts, Wes 

ot 
pes ; == 
J 







