SUBJECT AND AUTHOR INDEX 



ACIDS to Infusoria. II. The role of mole- 

 cule and of ions. The toxicity of 67 



Acids to Infusoria. III. Antagonism of the 

 toxic action of acids by inorganic chlorides. 

 The toxicity of 75 



Allelomorphs of Drosophila. The direction 

 and frequency of mutation in the bar-eye 

 series of multiple 203 



Amaroucium constellatum and Amaroucium 

 pellucidum, with special reference to pho- 

 tic orientation. Reactions to light in the 

 larvae of the ascidians 149 



Amaroucium pellucidum, with special refer- 

 ence to photic orientation. Reactions to 

 light in the larvae of theascidians, Amaron- 

 cium constellatum and 149 



Amicronucleate races of Infusoria. Micro- 

 nucleate and 329 



Amphibian larvae. Experiments on the ori- 

 entation of the ear vesicle iii 17 



Annelids. Direct demonstration of the exist- 

 ence of a metabolic gradient in 1 



Antagonism of the toxic action of acids by 

 inorganic chlorides. The toxicity of acids 

 to Infusoria. Ill 75 



Anuran larvae. The relation of the pars inter- 

 media of the hypophysis to pigmentation 

 changes in 119 



Ascaris felis Goeze. The spermatogenesis of. . 189 



Ascidians, Amaroucium constellatum and 

 Amaroucium pellucidum, with special 

 reference to photic orientation. Reac- 

 tions to light in the larvae of the 149 



BAR-EYE series of multiple allelomorphs 

 of Drosophila. The direction and fre- 

 quency of mutation in the 203 



Blue-green caterpillars: the origin and ecology 

 of a mutation in hemolymph color in 



Colias (Eurymus) philodice 385 



BoDiNE, Joseph H.'Ill. Some factors influ- 

 encing the catalase content of organisms. . 143 

 Bunsen-Roscoe law. The photic reactions 



of tadpoles in relation to the 235 



CALKINS, G.\RT N. Uroleptus mobilis 

 Engelm. IV. Effect of cutting during 

 conj ugation 449 



Catalase content of organisms. Some factors 

 influencing the 143 



Caterpillars: the origin and ecology of a muta- 

 tion in hemolymph color in Colias (Eury- 

 mus) philodice. Blue-green 385 



Changes during mitosis. Protoplasmic vis- 

 cosity 417 



Chlorides The toxicity of acids to Infusoria. 

 III. Antagonism of the toxic action of 

 acids by inorganic ' 75 



Colias (Eurymus) philodice. Blue-green 

 caterpillars: the origin and ecology of a 

 mutation in hemolymph color in 385 



CoLLETT, M. E. The toxicity of acids to 

 Infusoria. II. The role of molecule and 

 of ions 67 



CoLLETT, M. E. The toxicity of acids to 

 Infusoria. III. Antagonism of the toxic 

 action of acids by inorganic chlorides 75 



495 



Color in Cohas (Eurymus) philodice. Blue- 

 green caterpillars: the origin and ecology 

 of a mutation in hemolymph 385 



Commissuralis. Experimental control of or- 

 ganic polarity by the electric current. I. 

 Effects of the electric current on regenerat- 

 ing internodes of Obelia 471 



Conjugation in diverse races of Paramecium. 

 The conditions for 339 



Conjugation. Uroleptus mobilis Engelrii. 

 IV. Effect of cutting during 449 



Constellatum and Amaroucium pellucidum, 

 with special reference to photic orienta- 

 tion. Reactions to light in the larvae of 

 the ascidians, Amaroucium 149 



Control of organic polarity by the electric 

 current. I. Effects of the electric current 

 on regenerating internodes of Obelia com- 

 missuralis. Experimental 471 



Current. I. Effects of the electric current on 

 regenerating internodes of Obelia com- 

 missuralis. Experimental control of or- 

 ganic polarity by the electric 471 



DAY, Edward C. The physiology of the 

 nervous system of the tunicate. II. The 

 relation of the nerve ganglion to the 



heart 45 



Domestic fowl. XVIII. Further "observa- 

 tions on the anatomical basis of fecundity. 

 Studies on the physiology of reproduction 



^ in the 101 



Drosophila. The direction and frequencv of 

 mutation in the bar-eye series of multiple 

 allelomorphs of 203 



EAR vesicle in amphibian larvae. Experi- 

 ments on the orientation of the 17 



Ecology of a mutation in hemolymph color 

 in Colias (Eurymus) philodice. Blue- 

 green caterpillars: the origin and 385 



Electric current. I. Effects of the electric 

 current on regenerating internodes of 

 Obelia commissuralis. Experimental con- 

 trol of organic polarity by the 471 



FECUNDITY. Studies on the physiology 

 of reproduction in the domestic fowl. 

 Xyill. Further observations on the ana- 

 tomical basis of 101 



Felis Goeze. The spermatogenesis of Ascaris. 189 

 Fowl. XVIII. Further observations on the 

 anatomical basis of fecundity. Studies 

 on the physiology of reproduction in the 

 domestic loi 



GALIGHER, Albert E., Hym.^n, Lib- 

 BiE H., AND. Direct demonstration of 

 the existence of a metabolic gradient in 



annelids 1 



Ganglion to the heart. The physiology of 

 the nervous system of the tunicate. II. 



The relation of the nerve 45 



Gerould, John H. Blue-green caterpillars: 

 the origin and ecology of a mutation in 

 hemolymph color in Colias (Eurymus) 

 philodice 385 



