III. 
IV. 
CONTENTS OF No. 1, MAY, 1896. 
Yolk-Nucleus and Polar Rings. KATHARINE 
Foot 
Variations in the Development of Limulus 
Polyphemus. WILLIAM PATTEN 
Budding in Compound Ascidians, based on 
Studies on Goodstria and Perophora. W. 
Be RITTER 
On the Smallest Parts of Stentor capable of 
Regeneration ; a Contribution on the Limits 
of Divisibility of Soe Matter. FRANK 
E. LILiiz 
Organic Variation as a Criterion of Develop- 
ment. T. H. MONTGOMERY, JR. . 
Che Atheneum Press. 
GINN & COMPANY, BOSTON, U.S.A 
PAGES 
I-16 
17-148 
149-238 
239-249 
251-308 
