Number 3, May, 1905 



The Morphology of the Vertebrate Head from the Viewpoint of the Func- 

 tional Divisions of the Nervous System. By J. B. Johnston. 

 (Frotn the Zoological Laboratory of IVest Virginia University.) With 

 Plates I to IV 175 



Literary Notices 276 



Number 4, July, 1905. 



The Sense of Hearing in Frogs. By Robert M. Yerkes. (From the 



Harvard Psychological Laboratory.) With seven figures in the text. 279 



The Reactions of Ranatra to Light. By. S. J. Holmes. (From the 

 Zoological Laboratory 0/ the University of Michigan.) With six fig- 

 ures in the text. .......... 305 



Literary Notices 35° 



No. 5, September, 1905. 



A Study of the Functions of Different Parts of the Frog's Brain. By WiL- 

 HELM LoESER, M.D. (From the Physiological Laboratory of the Uni- 

 versity of Kansas.) . . . . . . . -355 



The Central Gustatory Paths in the Brains of Bony Fishes. By C. JUDSON 

 Herrick. (Studies from the Neurological Laboratory of Denison 

 University. No. XVLII.) 375 



Literary Notices 457 



Number 6, November, 1905. 



Some Cellular Changes in the Primary Optic Vesicles of Necturus. By 

 Clarence LoEB, A.M., M.D. St. Louis. (From the Anatomical Lab- 

 oratory, St. Louis University.) With Plate V 459 



Some Results of a Study of Variation and Correlation in Brain-Weight. 



By Raymond Pearl. 467 



The Relation Between the Occurrence of White Rami Fibers and the Spin- 

 al Accessory Nerve. By A. H. Roth, A.B., M.D., Lnstructor of 

 Anatomy in the University of Michigan. (With an Addendum by J- 

 Playfair McMurrich.) With one figure 482 



Respiration and Emotion in Pigeons. By John E. Rouse. (From the 



Harvard Psychological Laboratory.) . ..... 494 



The Effect of the Bearing of Young upon the Body-weight and the 

 Weight of the Central Nervous System of the Female White Rat. 

 By John B. Watson. (From the Neurological Laboratory of tlue 

 University of Chicago.) With Plate VL 514 



Editorial 



The Work of Carl Wernicke. 525 



Papers on Reactions to Electricity in Unicellular Organisms. By. H. S. 



Jennings 528 



Literary Notices. . .......... 535 



