UNIVERSITY OF CALIFORNIA PUBLICATIONS 



IN 



ZOOLOGY 



Vol. 20, No. 21, pp. 447-476, plates 40-41, 2 figs, in text November 10, 1923 



MORPHOLOGY AND BINARY FISSION OF 

 MENOIDIUM INCURVUM (FRES.) KLEBS 



BY 



RICHARD P. HALL 



CONTENTS 



PAGE 



Introductory and historical 448 



Material and technique 449 



General morphology 450 



Neuromotor system 451 



Gullet and reservoir 452 



The nucleus 453 



Habits and activities 453 



Nuclear division 4.54 



Resting stage 454 



Prophase 455 



Metaphase 455 



Anaphase 456 



Telophase 456 



Binary fission 457 



Paradesmose 458 



Gullet and reservoir 4.59 



Discussion ' 460 



The resting nucleus 462 



The endosome 463 



Prophase 465 



Metaphase 466 



Anaphase and telophase , 467 



Summary 468 



Literature cited 469 



Explanation of plates 474 



