Contents 



PAGE 



The Fine Structltre of Cells in Hydra ... 1 



Arthur Hess 



The Fine Structure of Intercellular and Mesogleal 

 Attachments of Epithelial Cells in Hydra , . 51 



Richard L. Wood 



Is there a Nervous System in Hydra? .... 69 



Floor Discussion 



Nematocyst Development ...... 77 



David B. Slautterback 



The Fine Structure of the Stenoteles of Hydra . 131 



George B. Chapman 



Chemistry of Nematocyst Capsule and Toxin of Hydra 

 littoralis .......... 153 



Edward S. Kline 



Physalia Nematocysts and Their Toxin . . . 169 



Charles E. Lane 



Compounds of Pharmacological Interest in Coelen- 

 terates .......... 179 



John H. Welsh 



