570 



INDEX 



MAcDOWELL, Edwin Carlton. Bristle in- 

 heritance in Drosophila. I. Extra bristles. 



61 

 Mattoon, W. E., Zeleny, Charles and. The 

 effect of selection upon the ' bar eye' mutant 

 of Drosophila ' 515 



MiDDLETON, Austin Ralph. Heritable varia- 

 tions and the results of selection in the fission 

 rate of Stylonychia pustulata. 4.51 



Morgan, T. H. The predetermination of sex in 

 phylloxerans and aphids. 285 



Mutant of Drosopnila. Tne effect of selecUon 

 upon the 'bar eye.' 515 



NASUTUM. I. The life history. Didinium 

 225 



OCCURRENCE of lethal factors in inbred 

 and wild stocks of Drosophila. The 531 

 Orientation of Amphioxus during locomotion. 

 The 37 



PACKARD, Charles. The effects of the 

 beta and gamma rays of radium on pro- 

 toplasm. 323 



Painter, Theophilus S. The effect of carb -n 

 dioxide on the eggs of Ascaris. 355 



Paramecium caudatum. The effects of certain 

 salts, and of adaptation to high temperatures, 

 on the heat resistance of . ^\^ 



Paramecium caudatum. Variation and inheri- 

 tance of abnormalities occurring after con.iu- 

 gation in 387 



Pearl, Raymond, Curtos, Maynie R. and. 

 Studies on the physiology of reproduction in 

 the domestic fowl. X. Further data on 

 somatic and genetic sterility, 45 



Phylloxerans and aphids. The predetermina- 

 tion of .sex in 285 



Physico-chemical explanation of certain groups 

 of fluctuating variation. An attempt at a 559 



Physiology of reproduction in the domestic fowl. 

 X. Further data on somatic and genetic 

 sterility. Studies on the 45 



Predetermination of sex in phylloxerans and 

 aphids. The 285 



Protoplasm. The effects of the beta and gamma 

 rays of radium on 323 



Pustulata. Heritable variations and the results 

 of selection in the fission rate of Stylonychia 



451 



RADIU.M on protoplasm. The effects of the 

 beta and gamma rays of 323 



Rats held at constant body-weight by underfeed- 

 ing for various periods. Changes in the rela- 

 tive weights of the various parts, systems and 

 organs of young albino 99 



Rays of radium on protoplasm. The effects of 

 the beta and gamma. _ _ 323 



Reactions and resistance of fishes in their natural 

 environment to salts. The 243 



Reactions of animals and plants. The relative 

 efficiency of various parts of the spectrum for 

 the heliotropic 23 



Reproduction in the domestic fowl. X. Fur- 

 ther data on somatic and genetic sterility. 

 Studies on the physiology of 45 



Reproduction of Hydra. Inheritance in the 

 asexual _ 157 



Resistance of fishes in their natural environment 

 to salts. The reactions and 243 



Resistance of Paramecium caudatum. The ef- 

 fects of certain salts, and of adaptation to 

 high temperatures, on the heat 211 



SALTS, and of adaptation to high tempera- 

 tures, on the heat resistance of Paramecium 

 caudatum. The effects of certain 211 



Salts. The reactions and resistance of fishes in 

 their natural environment to 243 



Selection in the fission rate of Stylonychia pustu- 

 lata. Heritable variations and the results of 



451 



Selection upon the 'bar eye' mutant of Droso- 

 phila. The effect of 515 



Senay, C. T., Zeleny, Charles and. Varia- 

 ation in head length of spermatozoa in seven 

 additional species of insects 505 



Sex in phylloxerans and aphids. The predeter- 

 mination of 285 



Spectrum for the heliotropic reactions of animals 

 and plants. The relative efficiency of vari- 

 ous parts of the 23 



Spermatozoa in seven additional species of in- 

 sects. Variation in head length of 505 



Stark, Mary B. The occurrence of lethal fac- 

 tors in inbred and wild stocks of Drosophila. 



•531 



Sterility. Studies on the physiology of repro- 

 duction in the domestic fowl. X. Further 

 data on somatic and genetic 45 



Stocking, Ruth J. Variation and inheritance of 

 abnormalities occurring after conjugation in 

 Paramecium caudatum 387 



Stylonychia pustulata. Heritable variations and 

 the results of selection in the fission rate of 



451 



TEMPERATURES, on the heat resistance of 

 Paramecium caudatum. The effects of cer- 

 tain salts, and of adaptation to high 211 



UNDERFEEDING for various periods- 

 Changes in the relative weights of the various 

 parts, systems and organs of young albino 

 rats held at constant body-weight by 99 



VARIATION. An attempt at a physico- 

 chemical explanation of certain groups of 

 fluctuating 559 



Variation and inheritance of abnormalities oc- 

 curring after conjugation in Paramecium 

 caudatum _ 387 



Variation in Drosophila. A linkage 1 



Variations and the results of selection in the fis- 

 sion rate of Stylonychia pustulata. Heritable 



451 



Variation in head length of spermatozoa in seven 



additional species of insects 505 



WASTENEYS, Hardolph, Loeb, Jacques 

 and. The relative efficiency of various 

 parts of the spectrum for the heliotropic 

 reactions of animals and plants 23 



Weights of the various parts, systems and organs 

 of young albino rats held at constant body- 

 weight by underfeeding for various periods. 

 Changes in the relative 99 



Wells, Morris M. The reactions and resistance 

 of fishes in their natural environment to salts. 



243 



Wild stocks of Drosophila. The occurrence of 



lethal factors in inbred and 531 



ZELENY, Charles and Mattoon, W. E. The 

 effect of selection upon the 'bar eye' mu- 

 tant of Drosophila 515 

 Zeleny, Charles, and Senay, C. T. Varia- 

 f tion in head length of spermatozoa in seven 

 additional species of insects 505 



