Neurology and Psychology (Continuing the Journal of Comparative Neurology) J. MARK BALDWIN, Johns Hopkins University S. I. FRANZ, McLean Hospital, Waverley, Mass. S. J. HOLMES, University of Michigan B. F. KINGSBURY, Cornell University C. LLOYD MORGAN, University College, Bristol VOLUME XIV. DENISON UNIVERSITY, GRANVILLE, OHIO 1904. Comparative Neurology and Psychology The Relation of the Motor Endings on the Muscle of the Frog to Neigh- boring Structures. By JOHN GORDON WILSON, M.A., M.B. (Edin.) From the Hull Anatomical Laboratory of the University Space Perception of Tortoises. By ROBERT M. YERKES. From the Har- vard Psychological Laboratory. A Note on the Significance of the Form and Contents of the Nucleus in the Spinal Ganglion Cells of the Foetal Rat. By SHINKISHI HATAI. From the Neurological Laboratory of the University of Chicago. With Plates III and IV. An Establishment of Association in Hermit Crabs, Eupaguruş longicar- Physiological Evidence of the Fluidity of the Conducting Substance in the Pedal Nerves of the Slug-Ariolimax columbianus. By O. P. JEN- KINS and A. J. CARLSON. From the Physiological Laboratory of Leland Sanford, Jr., University. With one figure. The Nervous Structures in the Palate of the Frog: the Peripheral Net- works and the Nature of their Cells and Fibers. By C. W. PREN- 118 The Beginning of Social Reaction in Man and Lower Animals. By C. L. Inhibition and Reinforcement of Reaction in the Frog, Rana clamitans. On the Behavior and Reactions of Limulus in Early Stages of its Devel- |