PROTOZOA 9 
strands running from the motorium to sensitive areas, to the 
membranelles and to the long anal cirri. There are also strands 
connected with frontal, ventral, and marginal cirri, although these 
are not connected with the motorium. These cirri are irregular 
in their movements while the anal cirri are used chiefly in loco- 
motion. These last as mentioned, have definite connections with 
the motorium. Yocum traces the homology of the motorium 
with the blepharoplast of many forms. This is the coordinating 
structure which serves to regulate anterior and posterior regions 
Fig. 2. NEUROMOTOR SYSTEMS OF FLAGELLATES. Nuclei and neuromotor appa- 
ratus mostly shown by dark lines or masses. A-D. Origin of ble- 
pharoplast from the nucleus in Naegleria. x 1040. E. Flagellate after 
Robertson. x 1200. F. Trypanoplasma after Martin. G. Trichomitus 
after Kofoid and Swezy. x 800. H. Cercomonas after Wenyon. I. 
Chilomastix after Kofoid and Swezy. x 3185. J. Trichonympha after 
K. and S.’ x 150. K. Crithida, after McCulloch. x 1440. L. Leidy- 
ee eee and Swezy. x 200. M. Giardia, Kofoid and Christianson. 
x 2550. 
