The Journal of Comparative 



Neurology and Psychology. 



PUBLISHER'S ANNOUNCEMENT. 



Complete sets and separate volumes of back numbers of The 

 Journal of Comparative Neurology (volumes I to XIII) are for 

 sale at this office at the rate of $3.50 per volume unbound, carriage 

 pre-paid. Single numbers are also sold at prices varying with the 

 contents. The new series began with January, 1904. Contents of 

 the four numbers already issued follows. 



Volume XIV, Number 1, March, 1904-. 



The Relation of the Motor Endings on tlie Muscle of the Frog to Neigli- 

 boring Structures. l!y John Gordon Wilson. Two plates. 



Space I^erception of Tortoises. By Roisert M. Verkes. 



A Note on the Significance of the Form and Contents of the Nucleus in the 

 Spinal Ganglion Cells of the Foetal Rat. l>y Shinkishi Hatal Two plates. 



An Establishment of Association in Hermit Crabs. l]y E. G. Si'AI'LDING. 



Editorial. 



The Mid-Winter Meetings. 



Literary Notices. 



Volume XIV, Number 2, April, 1904. 



Physiological Evidence of the Fluidity ot the Conducting Substance in the 

 Pedal Nerves of the Slug — Ariolimax columbianus. Py O. P. Jenkins and A. 

 J. Carlson. One figure. 



The Nervous .Structures in the Palate of the Frog : the Peripheral Net- 

 works and the Nature of their Cells and Fibers. Py C. W. Prenliss. Twelve 

 figures. 



The Beginnings of Social Reaction in Man and Lower Animals. P>y C. L. 

 Herrick. 



Inhibition and Reinforcement of Reaction in the Frog, Rana clamitans. 

 By RoiiERT iVL Verkes. 



On the Behavior and Reactions of Limulus in Early Stages of its Develop- 

 ment. By Raymond Pearl. One figure. 



Editorial. 



Recent Studies on the Finer Structure of the Nerve Cell. By G. E. Cog- 

 hill. 



Literary Notices. 



Volume XIV, Number 3, June, 1904. 



An Enumeration of the Medullated Nerve Fibers in the Ventral Roots of 

 the Spinal Nerves of Man. By Ch.arles E. Inghert. Thirty-eight figures. 

 Editorial. 



Color Vision. By C. L. IIerrkk. 

 Literary Notices. 



Volume XIV, Number 4, July, 1904. 



The Associative Processes of the Guinea Pig. A Study of the Psychical 

 I)evelo]:)ment of an Animal with a Nervous System Well Medullated at liirth. 

 By Jessie Allen. Two plates and twelve figures. 



Editorial. 



Literary Notices. 



