G. H. F. Nuttall, H. B. Fantitam and A. Porter 333 
The movement of translation of the parasites within the corpuscles 
may be very active. In Diagram 1 A, A', two observers (G. H. F. N. and 
G. S. G.-S.) recorded the movements of a single parasite which came 
under observation 22 minutes after the blood was drawn, the preparation 
being maintained at 37°C. Active movements continued up to 114 
minutes, but they were not recorded longer than 94 minutes. Both 
Diagram 1. 
Fig. A and A'. Course of movement pursued by a single ovoid parasite during a period of 
72 minutes. The observation commenced 22 minutes after the blood was drawn and 
ended at 94 minutes. The tracing A' is merely a continuation of A; 28. ii. 09. 
(G. H. F. N. and G. S. G.-S.) 
Fig. B. Course pursued by a small pear-shaped parasite during the interval 44' to 64'; 
28. ii. 09. (H. B. F.) 
In both cases the observation was made at 37° C., and the observers agreed that 
the parasite appeared to grow slightly in size during the time they were observed. 
N.B.—The numbers in the various diagrams denote the minutes that had elapsed 
since the blood was drawn and the time when the position of the parasite was recorded. 
