XIV CONTENTS 



Page 

 Inhibition in Molluscan Hearts and the Role of Acetylchohne 



by Ernst Florey and Harriet J. Merwin . . 136 



Cardiac Inhibition in Decapod Crustacea 



by Donald M. Maynard ....... 144 



Chemopotentials in Giant Nerve Cells (Aplysia fasciata) 



by N. Chalazonitis . . . . . . . .179 



Excitatory and Inhibitory Processes Initiated by Light and Infra-red 

 Radiations in Single Identifiable Nerve Cells (Giant Ganglion Cells 

 of Aplysia) 

 by A. Arvanitaki and N. Chalazonitis . . . . . 194 



On the Anatomy of the Giant Neurons of the Visceral Ganglion of 

 Aplysia 

 by Theodore H. Bullock ....... 233 



Inhibhory Interaction in the Retina and its Significance in Vision 



by H. K. Hartline, F. Ratcliff and W. H. Miller . . .241 



Excitatory and Inhibitory Processes in Crustacean Sensory Nerve Cells 



by C. Eyzaguirre ......... 285 



Excitation, Inhibition and the Concept of the Stimulus 



Zjj Ernst Florey ........ 318 



Excitation by Hyperpolarizing Potentials. A General Theory of 

 Receptor Activities 

 by Harry Grundfest ........ 326 



The Identification of Mammalian Inhibitory Transmitters 



by David R. Curtis 342 



Inhibitory Transmitters — A Review 



H. McLennan 350 



Further Observations Concerning the Inhibitory Substance Extracted 

 from Brain 



by K. LissAK, E. Endroczi and E. Vincze .... 369 



Extraction of an Excitatory Substance from Dog's Brain 



by Takashi Hayashi, Kazuo Nagai and Keisaburo Miyata . 376 



Comments on the Excitine-Inhibitine Hypothesis 



by Takashi Hayashi ......•• 378 



