author's abstract of this p.U'er issued 



BY the bibliographic SERVICE , JANUARY 12 



STUDIES OF AMITOSIS: ITS PHYSIOLOGICAL RELA- 

 TIONS IN THE ADIPOSE CELLS OF INSECTS, 

 AND ITS PROBABLE SIGNIFICANCE 



WARO NAKAHARA 



Entomological Laboratory, Cornell University, Ithaca, N'. Y. 



THIRTY-SIX FIGURES (SIX PLATEs) 



CONTENTS 



I. Introductory 483 



II. Material and technique 484 



III. The relation of the amitotic nuclear division to the cell-metabolism. . 485 



A. Structural changes in the larval adipose cells 485 



a. Review of the Perez 's work 485 



b. Observ«,tions on Pieris 487 



B. Some plasma structures 488 



a. Fat 488 



b. Albuminous granules 488 



c. Urates 491 



d. Glycogen 491 



e. Mucus (?) 492 



C. Nuclear division 492 



a. Amitosis 492 



d. Mitosis 495 



D. General considerations 495 



IV. The significance of amitosis 496 



A. Historical 496 



B. Discussion 504 



V. Conclusions. 509 



Bibliography 510 



I. INTRODUCTORY 



The present paper embodies the results of my investigation 

 on the relation of the amitotic nuclear division and metabolic ac- 

 tivity in the adipose cells of insects, together with historical re- 

 view and discussions on the general subject of amitosis. Pre- 

 liminary results of the study have been published in The 

 Anatomical Record in a brief form (Nakahara, '17). 



483 



