xxiv ILLUSTRATIONS 



186. A seventy-two-hour regenerate produced from a lateral cell 



of the first branch generation in Zoothamnium .... 808 



187. Branch C of a Zoothamnium colony fifty-six hours after in- 



jury to the neuromuscular cord 810 



188. The changes in number of Plasmod'nwi brasilianum and the 



percentage of segmenters during the acute rise and crisis 



of the infection in a Central American monkey . . . 845 



189. The changes in number of Trypanosoma lew} si and the co- 



efficient of variation and percentage of division forms dur- 

 ing the course of infection in the rat 856 



190. The demonstration of ablastin against Trypanosoma lewisi 



by passive transfer 859 



191. The changes in number of Trypanosoma rhodesiense and 



the coefficient of variation during the course of infection 



in a mouse 862 



192. The changes in number of Trypanosoma rhodesiense and 



the coefficient of variation during the course of infection 



in a guinea pig 865 



193. The demonstration of a trypanolysin against a passage strain 



of Trypanosoma equinum by passive transfer .... 867 



194. Posterior end of larva of y^^-'i^^j (Stegomyia) scutellaris paisi- 



sitized by ciliates 897 



195. One-day-old nymph of Kalotermes jlavicolUs, receiving proc- 



todaeal food from the female termite 927 



196. Streblomastix strix attached to the lining of the hind-gut of 



Zootermopsis angusticollis 930 



197. Fixation mechanisms in peritrichs 931 



198. Fixation apparatus of Cyclochaeta [Urceolaria) korschelti . 932 



199. Thigmotricha 939 



200. Thigmotricha 941 



201. Ptychostomidae 944 



202. Skeletal structures and attachment organelles in Astomata . 948 



203. Anoplophrya (Collinia) circulans in Asellus aquaticus . . 951 



204. Conidiophrys pilisuctor on Corophium acherusicmn . . . 955 



205. Synophrya hyperirophica; dia-gad-tn of Vde cycle 958 



206. Ingestion of plant material by Ophryoscolecidae .... 978 



207. Ingestion and digestion of starch in Eudiplodinium mediutn 980 



