author's abstract op this paper issued 

 by the bibliographic service, october 13 



GERM CELLS OF COELENTERATES 



VI. GENERAL CONSIDERATIONS, DISCUSSION, CONCLUSIONS 



GEORGE T. HARGITT 



Zoological Laboratory, Syracuse University 



THIRTY FIGURES (THREE PLATES) 



CONTENTS 



I. Introduction 1 



II. Origin of germ cells 2 



1. Place of origin 2 



2. Time of origin 3 



3. Conclusions 12 



III. The germ-plasm theory 12 



1. General statement and discussion of the theory 12 



2. Evidence from Hydrozoa 14 



a. Germ cells 14 



b. Budding 15 



c. Regeneration 21 



d. Dissociated cells 23 



3. Evidence from germ cells, outside of Hydrozoa 26 



4. Evidence from tissue cultures 27 



5. Evidence from cancer cells 29 



6. Summary and conclusions 30 



IV. Growth of egg cells 32 



1. Cytoplasmic growth 32 



2. Nuclear growth 33 



3. Cytoplasmic inclusions 36 



V. Chromosomes 42 



VI. Summary and conclusions 45 



I. INTRODUCTION 



The study of the germ cells of the Coelenterates was under- 

 taken with the primary aim of securing a series of observations 

 upon the behavior of these cells in a variety of types within the 

 phylum. The original plan included the study of representative 

 forms of Hydrozoa, Scyphozoa, and Actinozoa. The last class 



