= 
PARASITIC PROTOZOA FROM CEYLON. 69 
simondi, Castellani and Willey. Some individuals harboured try- 
panosomes and hemogregarines in addition. A single specimen 
from Habsrana (Aug.) was infected with trypanosomes. (See 
remarks below.) 
B.—Not infected. 
2. Calotes ophiomachus.—Kight individuals (Colombo, July). 
3. Calotes versicolor —Twenty-five specimens from Colombo 
(July) and one from Peradeniya (Aug.). 
4. Ceratophora stoddartii.—Three individuals (Peradeniya, Sept. ). 
5. Hemidactylus depressus. — Six individuals (Trincomalee, 
Sept.). 
6. Hemidactylus frenatus. — A single specimen (Trincomalee, 
Sept.). 
7. Hemidactylus triedrus.—One individual from Colombo (Aug.), 
one from Peradeniya (Aug.), and two from Trincomalee (Sept.). 
8. Lygosoma punctatum.—Five specimens (Peradeniya, Aug.). 
9. Lyriocephalus scutatus.—Three specimens (Peradeniya, Aug.). 
10. Mabuia carinata—Three individuals from Colombo (July), 
two from Peradeniya (Aug.), one from Colombo (Sept.), and one 
from Peradeniya (Sept.). 
11. Sitana ponticeriana.—One individual (Trincomalee, Sept.). 
12. Varanus bengalensis—A_ single specimen (Trincomalee, 
Sept.). 
Comments.—It is curious to find that all the lizards—geckoes 
excepted—harbour no blood Protozoa. In Europe and in Africa 
(cf., for example, Wenyon’s recent work, 1908a) the lizards are 
frequently infected with hemogregarines, but Asiatic lizards appear 
to be much less frequently so. The absence of Protozoa in the blood 
of Indian lizards was remarked by Berestneff (1903). Since then 
Minchin (1907) has described a hemogregarine (H. thomsoni) from 
a Himalayan. lizard (Agama tuberculaia), but facts with regard to the 
infection of other Asiatic lizards are extremely scanty. 
Hemocystidium simondi, which I found in the Trincomalee 
specimens of Hemidactylus leschenaultii, was discovered and described 
by Castellani and Willey (1904), and has since been observed by 
Miss Robertson (1908). I was fortunate enough to be able to work 
out a part of the life-cycle of this organism. the description of 
which I shall publish elsewhere. 
The trypanosomes which I found were those described by Miss 
Robertson (1908) as 7’. leschenaultit. Another form which she 
observed in H. leschenaultii and H. triedrus, and named by her 
T’. pertenue, I never encountered. 
It is perhaps worthy of comment that I have—in common with 
previous workers—never found Protozoa in the blood of Hemiz-, 
dactylus depressus, although it lives in the jungle in company with 
the infected geckoes. 
