504 
INDEX 
Retina. The structure of the retina of Alli- 
gator mississippiensis and its photome- 
chanical changes. Studies on the 207 
Roberts, E., Detlefsen, J. A, and. Studies 
on crossingover. I. Theeffect of selection 
on crossover values 333 
SARS. The feeding habits and chemical 
sense of Nereis virens 427 
Selection on crossover values. Studies on 
crossing over. I. The effect of 333 
Sense of Nereis virens Sars. The feeding 
habits and chemical 427 
Sericeus Say. Spermatogenesis in the fly, 
Asilus 165 
Sexual cycle of Ra na catesbeiana larvae. The 
germ cells of anurans. I. The male 235 
Spermatogenesis in the fly, Asilus sericeus Say 165 
Swingle, Wilbur Willis. The germ cells of 
anurans. I. The male sexual cycle of 
Rana catesbeiana larvae 235 
Symmetry in transplanted limbs. On rela- 
tions of 1 
TEMPERATURE on crossing over. Fur- 
ther studies on the effect of 187 
Transplanted limbs. On relations of sym- 
metry in 1 
VARIATIONS in the intensity of oxidation 
in the life-cycle. An explanation for the 203 
Virens Sars. The feeding habits and chemical 
sense of Nereis 427 
WATER content and the rate of metabo- 
lism of certain Oithoptera. Factors 
influencing the 137 
Whitlock, W. Carl, Kepner, Wm. A., and. 
Food reactions of Ameba proteus 397 
