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University of California Publications in Zoology [Vol. 20 



the outgrowth of new tlagella. It is probable that "basal granules" 

 occasionally seen at the points of emergence of the fiagella are prophase 

 phenomena suggestive of the emergence of new flagella. 



Eodenwaldt (1912, fig. 4) in Prowazek, Handbuch der Pathogenen 

 Protozoen, has given an entirely different, and in the light of our 

 evidence, an incorrect interpretation of the nature of this outgrowth. 

 His figures 4-1 to 4-V fail to show the progressive changes in the 



Figs. F-K. Several stages in the origin of the new anterolateral flagella from 

 the blephai-oplasts and transverse commissure by new outgroirth establishing the 

 basis for the fission of the organism in the longitudinal frontal plane. X 2400. 



Fig. F. Slight anterior projection of the transverse commissure. Karyosome 

 elongating in nuclear axis along the intranuclear rhizoplast. 



Fig. G. Transverse commissure carried anteriorly in the form of an inverted 

 V. Paradesmose formed, karyosome transforming into longitudinal skein. 



Fig. H. New anterolateral flagella diverging from the tip of outgrowth. 

 Skein resolved into chromosomes. 



Fig. I. Continued outgrowth of anterolateral flagella. Posterior peristomal 

 fiber divided. Nuclei approaching metaphase. 



Fig. J. Outgrowth of anterolaterals reaches the periphery. Nuclei in anaphase. 



Fig. K. Outgrowth of free ends of new anterolaterals. Mitosis completed. 



V-shaped process and he incorrectly connects the axostyles with the 

 tip of the process, whereas they retain their connections with the 

 blepharoplasts from which the parental anterolateral flagellar arch 

 springs. His figures also incorrectly leave these blepharoplasts 

 stranded on the rhizoplasts. Wenj'on and O'Connor (1917, pi. 2, 

 figs. 1-5) figure correctly but do not diseu.ss the significance of several 

 stages in the origin of the daughter anterolaterals. They separate the 



