CONTENTS 



No. 1. MAY 



Tadac'hika Minoura. a .study of testis and ovary grafts on the hen's egg 

 and their effects on the embryo. One text figure and ten plates (thirty- 

 six figures) 1 



Benjamin H. Willier. Structures and homologies of free-martin gonads. 



Eighteen figures 63 



Carl R. Moore. On the physiological properties of the gonads as con- 

 trollers of somatic and psychical characteristics. III. Artificial her- 

 maphroditism in rats. Fifteen figures 129 



DwiGHT E. MiNNiCH. An experimental study of the tarsal chemoreceptors 



of two nymphalid butterflies. Six figures 173 



G. H. Parker. The locomotion of the holothurian Stichopus panimensis 

 Clark. One figure. .• 205 



E. C. MacDowell and E. M. Vicari. Alcoholism and the behavior of 

 white rats. I. The influence of alcoholic grandparents upon maze- 

 behavior. Seventeen figures 209 



Arch E. Cole. Oxygen supply of certain animals living in water containing 

 no dissolved oxygen. Two figures 293 



No. 2. JULY 



H. H. Newman. The experimental production of twins and double monsters 

 in the larvae of the starfish Patiria miniata, together with a discussion 

 of the causes of twinning in general. Forty-six figures 321 



John F. Fulton. Concerning the vitalit}^ of Actinia bermudensis: A study 



in symbiosis 353 



Carl R. Moore. On the physiological properties of the gonads as con- 

 trollers of somatic and psychical characteristics. IV. Gonad trans- 

 plantation in the guinea-pig. Four figures 365 



G. H. Parker. The power of adhesion in the suckers of Octopus bimaculatus 

 Verrill. One figure 391 



Chikanosuke Ogawa. Experiments on the regeneration of the lens in 



Diemyctylus. Four figures 395 



C. M. Child. Studies on the dynamics of morphogenesis and inheritance 

 in experimental reproduction. XI. Physiological factors in the devel- 

 opment of the planarian head. Thirty-three figures 409 



Tokuyasu Kudo. Studies on the effects of thirst. II. Effects of thirst 

 upon the growth of the body and of the various organs in young albino 

 rats 435 



Leslie B. Arey. An experimental study on glochidia and the factor 



underlying encystment. Three plates (fifteen figures) 463 



iii 



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