600 



INDEX 



NASAL pits in Amblystoma embryos. The 

 effects of the removal of the 27 



OLIGOCHAETES. An analysis of the 

 process of regeneration in certain micro- 



drilous 99 



Orientation in the colonial organism, Gonium 

 pectorale, and a study of the structure 

 and function of the eye-spot. The process 

 of 1 



PAINTER, Theophilus S. Contributions 

 to the study of cell mechanics. I. 

 Spiral asters 509 



Paramaecium caudatum. The periodic re- 

 organization process in 59 



Patten, Br.^dley M. The changes of the 

 blowfly larva's photosensitivity with age 585 



Pectorale, and a study of the structure and 

 function of the eye-spot. The process of 

 orientation in the colonial organism, 

 Gonium 1 



Photosensitivity with age. The changes of 



the blowfly larva's 585" 



Pineal organ. The reactions of the melano- 

 phores of Amblystoma larvae — the sup- 

 posed influence of the 237 



Pits in Amblystoma embryos. The effects of 

 the removal of the nasal 27 



Protective coloration. Some experiments on 457 



Pulsation of the cloaca of Holothurians. The 

 rhythmic 297 



REACTIONS of animals and plants. The 

 relative efficiency of various parts of the 

 spectrum for the heliotropic 217 



Reactions of the melanophores of Amblystoma 

 larvae — the supposed influence of the 

 pineal organ. The 237 



Reactions to light in Vanessa antiopa with 

 special reference to circus movements. . . . 357 



Regeneration in certain microdrilous oligo- 

 chaetes. An analysis of the process of . . 99 



Removal of the nasal pits in Amblystoma 

 embryos. The 'effects of the 27 



Reorganization process in Paramaecium cau- 

 datum. The periodic 59 



Retina of the tortoise and of the lizard. The 

 effect of light on the 165 







Rhinoceros beetle, Dynastes tityrus. Color 

 changes in the 435 



Rhythmic pulsation of the cloaca of Holo- 

 thurians. The 297 



Rotifers. The control of sex by food in five 

 species of 263 



SCHAEFFER, As.a. A. On the feeding 

 habits of Ameba 529 



Selection in hydra. Results of continued . 19 



Sex by food in five species of rotifers. The 

 control of 263 



Smooth muscle cell. Evidence proving the 

 melanophore to be a disguised type of . . 193 



Spaeth, Reynold A. Evidence proving the 

 melanophore to be a disguised type of 

 smooth muscle cell 193 



Spectrum for the heliotropic reactions of ani- 

 mals and plants. The relative efficiency 

 of various parts of the 217 



Spiral asters. Contributions to the study of 

 cell mechanics. 1 509 



Structure and function of the eye-spot. The 

 process of orientation in the colonial or- 

 ganism, Gonium pectorale, and a study of 

 the : 1 



TORTOISE and of the lizard. The effect 

 of light on the retina of the 165 



VANESSA antiopa, with special reference 

 to circus movements. Reactions to 

 light in 357 



WASTENEYS, Hardolph, Loeb, Jac- 

 ques, and. The relative efficiency of 

 various parts of the spectrum for the 

 heliotropic reactions of animals and plants 217 

 Water current produced by Ascidia atraJKjd' 



Lesueur. The 429 



Whitney, David Day. The control of sex by 



food in five species of rotifers 263 



Woodruff, Lor.vnde Loss, Erdm.vnn, 

 Rhoda, and. The periodic reorganiza- 

 tion process in Paramaecium caudatum. 59 



Y 



OLTNG, R. T. Some experiments on pro- 

 tective coloration 457 



