PARASITIC PROTOZOA FROM CEYLON. 77 
In company with these larger forms were a number of smaller 
forms. These I take to be young forms. They are the shape of a 
flattened spindle, and contain few nuclei (see fig. 18). Possibly 
they are organisms which are on their way to encystment. The 
small form figured (fig. 18) measured 38 v. x 13 wu. 
Bezzenberger (1904) has described Opaline from Bufo melanos- 
tictus, Rana cyanophlyctis, R. limnocharis, R. hexadactyla, and 
R. esculenta, var. chinensis, but he does not state from what part of 
Asia these animals came. 
Intestinal Parasites of Lizards. 
Parasitic flagellates were found in the gut in only two lizards: 
Hemidactylus leschenaultit and Mabuia carinata. Both these hosts 
contained both Trichomonas and. Trichomastiz, but a careful study 
was made of those in Mabuia only. 
( Trichomonas mabuice, n. sp. 
( Trichomastix mabuie, n. sp. 
I have elsewhere described (Dobell, 1909) in detail the structure 
of Trichomonas and Trichomastix batrachorum. The two organisms 
from Mabuia have a structure which is exactly similar. My chief 
reason for noting these organisms here is that they furnish a striking 
confirmation of what I have already described in the structure of 
the frog and toad parasites. 
Trichomonas mabuie (fig. 11) attains a length of 30 u, and it is 
quite easy to observe in the living animal, under an oil immersion, 
all the details of structure which I have already described in the 
much smaller 7. batrachorum. Structures which, in the latter, 
were frequently only made out in stained preparations, and with 
considerable difficulty, can be seen in 7. mabwie with the greatest 
clearness. The relations of the nucleus, axostyle, blepharoplast, 
and undulating membrane are exactly as I have already described 
them. To describe the forms from Mabuia would be merely 
to repeat what I have already written. I will therefore content 
myself with figuring Trichomonas mabuic, and would refer any one 
interested in the structure of these organisms to my earlier paper. 
The Parasites of Tropidonotus stolatus. 
As recorded on p. 70, I found three parasites in. the blood of this 
snake: a hemogregarine, a spirochet, and a trypanosome. The 
last two are new; the first is probably the same as the “ Danilew- 
skya” described in 7’. stolatus from Tonkin by Billet (1895). [Cf. 
also Dobell (1908).] 
(1) Trypanosoma tropidonoti, n. sp. 
I propose to give this name to the new trypanosome which I 
found in the blood of a 7’. stolatus at Peradeniya (see figs. 13, 14). 
