CONTENTS 
No. 1—August, 1909 
ErHet N. BROWNE 
The Production of New Hydranths in Hydra by the Insertion of Small 
Erotesies WVitOIKty-SIX-Rigutes, 6.4... : x. ad’nasdge me eee ee ee ae I 
M. Louise SHOREY 
The Effect of the Destruction of Peripheral Areas on the Differentiation 
othe Neuroblasts.. With Fifty-seven Figtikes.....70.. 2... oes 25 
C. M. Curtp 
Factors of Form Regulation in Harenactis attenuata. II. Aboral Resti- 
tution, Hetermorphosis and Polarity. With Twelve Figures........... 65 
“Francis B. SUMNER 
Some Effects of External Conditions upon the White Mouse. With 
POT CEU gE GOMER oes oa sls foe 38 SS Sia iene + Staley a biases pe ee 97 
Cuares W. Harcitt 
Further Observations on the Behavior of Tubicolous Annelids.......... 155 
No. 2—September, 1909 
HERBERT W. RAND 
Wound Reparation and Polarity in Tentacles of Actinians.............. 189 
V T.H. Morcan 
A Biological and Cytological Study of Sex Determination in Phylloxerans 
» and Aphids. With One Plate and Twenty-three Figures in Text...... 239 
C. M. CuiLp 
Factors of Form Regulation in Harenactis attenuata. III. Regulation 
Mar aiuaes With: | hitty-one FigGres., got aesann aves saws Tene sexe 353 
