INDEX 



497 



REACTIONS of tadpoles in relation to the 

 Bunsen-Roscoe law. The photic 235 



Reactions to light in the larvae of the as- 

 cidians, Amaroucium constellatum and 

 Amaroucium pellucidum, with special 

 reference to photic orientation 149 



Regenerating intcrnodes of Obelia commis- 

 suralis. Experimental control of organi 

 polarity by the electric current. I. Ef- 

 fects of the electric current on 471 



Reproduction in the domestic fowl. XVIII. 

 Further observations on the anatomical 

 basis of fecundity. Studies on the physi- 

 ology of 101 



Reptilian spermatogenesis. I. Thespermato- 

 genesis of lizards. Studies in 281 



SCHOPPE, William Freeman, Pearl, 

 Raymond, and. Studies on the physi- 

 ology of reproduction in the domestic 

 fowl. XVIII. Further observations on 



the anatomical basis of fecundity 101 



Spermatogenesis of Ascaris felis Goeze. The. . 189 

 Spermatogenesis. I. The spermatogenesis of 



lizards. Studies in reptilian 281 



Swingle, W. \V. The relation of the pars 

 intermedia of the hypophysis to pigmen- 

 tation changes in anuran larvae 119 



TADPOLES in relation to the Bunsen- 

 Roscoe law. The photic reactions of . . . 235 



Toxicity of acids to Infusoria. II. The role 

 of molecule and of ions. The 67 



Toxicity of acids to Infusoria. III. Antago- 

 nism of the toxic action of acids by inor- 

 ganic chlorides. The 75 



Tunicate. 11. The relation of the nerve gan- 

 glion to the heart. The physiology of the 

 nervous system of the 45 



UROLEPTUS mobilis Engelm. IV. Ef- 

 fect of cutting during conjugation 449 



VESICLE in amphibian larvae. Experi- 

 ments on the orientation of the ear. ... 17 

 Viscosity changes during mitosis. Proto- 

 plasmic 417 



WALTON, A. C. The spermatogenesis of 

 Ascaris felis Goeze 189 



Woodruff, Lorande Loss. Micronucleate 

 and amicronucleate races of Infusoria. . . . 329 



ZELENY, Charles. The direction and 

 frequency of mutation in the bar-eye 

 series of multiple allelomorphs of Droso- 

 phila 203 



