CONTENTS 
E. A. Andrews 
Coiijagatio'i in the crayfish, Cambarus affinis. From the 
Z oological Laboratory, ^ohns Hcoklns University. Eight 
tigures 235 
S. O. Mast 
Reactions in Amoeba 'o light. From the Biological Labor- 
atory, Goucher College. Two iigures 2G5 
H. S. Jennings 
What conditions indv? conjugation in Parame ' n? From 
the Zoological Labcxjtory, Joims Hopkins University. Four 
figures 270 
M. M. Metcalf 
Studies upon Amoeba. From the Zoological Laboratory, Ober- 
lin '^'ollege. F^Tty-£ v e figures? jOI 
Sanri!!.. R- .enhcuse 
The embryology of Stomotoca apicata. From the Biological 
Laboratory, Olivet C •lege. Thirty-two figures 333 
A. M. Reese 
The l ateral line system of Chimaera colliei. Fron- the Zoo- 
logical Laboratory, West V^'ginia University. Eighteen 
figures 341) 
Edwin Linton 
On a new Phandocoele commensal with Modiolu. ^.licatulus. 
l^rom the Biological Laboratory, Washington and Jefferson 
College. Forty-one figures 371 
R. ^. Cowles 
St^inuli produced by light and by contact with solid walls as fac- 
tors in the behavior of Ophiuroids. From the Zoologies! 
Laboratory, Johns H< )kins University. Thirteen iigures. . . 387 
Edwin G. Conklin 
The effects of centrifugal force upon the organization and devel- 
opment of the eggs oi fresh water pulmonates. 1^'rom the 
Biological Laboratorv Princeton University. Forty-seven 
figures 417 
Henry F. Nachtrieb 
The primitive pores of Polyodon spathula (WalbauL.). From 
the Laboratory of Animal Biology, The Univer ity u" Minne- 
s^+a. Tv'clve tiguv^b 4oo 
Two volumes of THE JOURNAL OF EXPERIMENT/ L ZOOLOGY 
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