316 Trypanosome and Haemogreyarine of Snake 
support of this can be deduced from an examination of the stained 
blood films. 
The body of the parasite is usually curved with the undulating 
membrane running on the convexity. This curve of the body probably 
represents the natural condition, for such a disposition of the body, 
though more marked, was a characteristic feature of Trypanosoma najae 
of the cobra. 
Measurements of two of the trypanosomes were as follows : 
Non-flagellar extremity to micronucleus 
Form with nucleus and 
micronucleus separate 
9-8 ft) 
Micronucleus to nucleus 
4-9 ft) 
Length of nucleus 
2-1 ft 
Nucleus to flagellar extremity 
11-2 ft 
Free flagellum 
5 "6 ft 
Total length of body 
33-6 ft 
Width of body 
4-2 ft 
Form with nucleus and 
micronucleus adjacent 
9-8 ft 
2-1 ft 
11-2 ft 
7-0 ju. 
30-1 ft 
2 - 8 ft 
The trypanosomes in the blood were fairly numerous: about one 
parasite to every 20 or 30 fields was the rule. 
For this trypanosome which cannot be identified with any known 
species I propose the name Trypanosoma erythrolampri from its host 
Erythrolamprus aesculapii. 
Haemogregarina sp. 
It has been mentioned that a haemogregarine occurred with the 
trypanosome just described. This parasite differs very little from some 
of the haemogregarines already noted from other snakes. The red 
corpuscles are slightly increased in size and their nuclei displaced by 
the presence of the parasite. In other respects there is no recognisable 
change. The parasite usually occurs as an elongated slightly curved 
body with rounded ends measuring about 12’5 by 5 g (Fig. 7). There 
is a delicate membrane or cyst enclosing the parasite which has its 
narrower end turned up. The cyst is less marked than it is in many 
haemogregarines. The protoplasm is vacuolated and the nucleus large 
and deeply staining. Some of the pai’asites are shorter and broader 
(Fig. 6) than the type just described but they show the same vacuolated 
protoplasm and deeply staining nucleus. The infection was a small 
one, there being many more trypanosomes in the films than haemogre¬ 
garines. 
