PROTOZOA 7 
nearest approach to a suggestion of it comes from the observations 
of Jennings upon an Amoeba which attempted to devour one 
smaller. The ingested specimen escaped its captor, the larger 
reversed its movements and followed the smaller and again took 
it in. 
The behavior of the larger might seem to be partly deter- 
mined by its earlier experience, but this might also be explained by 
a purely physical stimulus of a direct character. 
Any elements of psychical qualities which Amoeba might pos- 
Fig. 1. 
NEUROMOTOR SYSTEMS AND SENSORY SYSTEMS OF Protozoa. A, B. Dif- 
flugia showing the effects of stimulating the ends of the pseudopodia. 
Verworn. C. Neuromotor system of Euplotes, Yocum. The moto- 
rium is dark, strands to the organelles and to the cirri shown by 
lines. D. Euglena showing eye spot near gullet and flagellum. Kent. 
E. Gonium showing eye spot above. Mast. F, G@ and H. Neuromo- 
tor system in Diplodinium after Sharp. The dark lines show the loca- 
tion of the chief parts of the system. F. Ideal section of the whole. 
G and H. Views from side and mouth end. I. Stem of Voricella after 
Delage et Herouard, the contractile portion shown in dark, the conduc- 
tive part in lighter. 
