The Sylvian Fissure and Island of Rail xxvi 



Action of Bacterial Products on the Vaso-motor Centres xxvi 



The Brain of Ichthyophys xxvi 



The Innervation of the Electric Organs of Fishes xxvii 



Regions and Convolutions of the Prosencephalon xxviii 



The Fornix xxix 



The Tectum Opticum xxix 



Degeneration of Geniculatum xxix 



The Nervous Structures of Tunicates . xxx 



The Nervous System of Gasteropods xxx 



Histological Studies in the Nervous System of Leeches xxxi 



Nervous System of Nematoda xxxi 



The Development of the Nervous System of the Holo- 



thuroidea xxxi 



Neuroblasts in Arthropod Embryos xxxii 



The Nervous System of Echinoderms xxxii 



The Nervous System of Crustacea xxxiii 



Motor Functions of the Crustacean Nervous System xxxiv 



Technique and Memoranda xxxiv 



Recent Literature xxxvi 



SEPTEMBER, 1892. 



The Central Nervous System of Protopterus Annectens. 

 By Karl Rudolf Binrkhardt, Assistant in the Laboratory of 



Anatomy in the University of Berlin. With Plate XIII 89 



On the Histological Structure ok the Medulla of 



Petromyzon. By/. David, Ph.D. With Plate XIV 92 



Psychological Notes upon the Gallery Spider — Illustra- 

 tions of Intelligent Variation in the Construction 

 of the Web. By Charles H. Turner, M. S., Assistant in the 



Biological Laboratory of the University of Cincinnati 95 



The Psychophysical Basis of Feelings. By C. L. Herrick.^ iii 



Editorial. Instinctive Traits of Animals 115 



Literary Notices !• 



Visual Cortex of Laura Bridgeman li 



Comparative Physiology and Psychology Hi 



The Results of Amputation on the Nervous System liii 



Waller's law.___ Hi' 



Circulatory changes in Epilepsy . liv 



Traumatic Injuries to the Brain liv 



Pathology of iho Solar Plexus Iv 



The auditory centre 1^' 



Functions of Ganglion cells in the Cervical Cord Ivi 



The Pons and Anarthria Ivii 



Electrical Variations in the Cortex Ivii 



