H^MATOZOA FROM SOME CEYLON REPTILES. 183 



curling itself up and suddenly straightening itself. The process 

 takes only a very few seconds ; it also can be seen to injure corpuscles 

 which it touches in passing, the corpuscle losing aU its haemoglobin 

 immediately. 



The rapidity and the business-like precision of the animal's 

 movements were positively amazing. I was able to make out that 

 the animal swims by means of rapid shallow waves of contraction 

 passing backwards down its body, a slightly spiral twisting of the 

 whole creature often taking place at the same time. This hsemo- 

 gregarine shows an endocorpuscular stage very closely resembling 

 the free form. 



I do not wish it to be inferred that I have in any way made an 

 exhaustive search through the Ceylon reptiles. I examined the 

 animals I met, but it was more to my purpose to try and follow up 

 the positive cases than to spend the time revie\\dng the reptilian 

 fauna. In a later publication I hope to deal with these forms in 

 much greater detail. 



I subjoin the diagnoses of the new species mentioned in this 

 paper. 



Trypanosoma vittatce, mihi. Fig. 1. 



Massive trypanosome, body about 50-56 /^ in length, and about 

 6 /^ well developed membrane. Free flageUum 22-30 ^ in length. 

 Rod-shaped kinetonucleus body behind kinetonucleus very variable 

 in length. Trophonucleus generally about 6-8 yit in front of 

 kinetonucleus , but sometimes much further forward. Characteristic 

 spiral movement, very small forms present in the blood of vertebrate 

 host. Divides in transmitting host into four (also on sealed slide) ; 

 small flagellated individuals \Aith kinetonucleus anterior to the 

 trophonucleus. These develop later in slender trypanosomes. Trans- 

 mitting host, a small water leech, Glossiphonia (sp. ?) ; vertebrate 

 host, Emyda vittata. Infection found all over Ceylon. 



Hcemogregarina vittatce, mihi. Figs. 2 and 3. 



Hsemogregarine infection associated almost invariably with T. 

 vittatce. Two forms present : (1) broad massive form ; (2) recurved 

 form with pale protoplasm ; the two Hmbs are equally long, dense 

 nucleus, length when uncurled 22-26 ^. Broad form shows 

 reticulate dense protoplasm, rather dehcate loose nucleus ; the 

 larger forms have two red staining plastid (?) like bodies at one 

 end. Schizogony occurs in the spleen and liver ; 8 reproductive 

 bodies are formed ; these are enclosed in pairs in a dehcate 

 boat-shaped capsule. Transmitting host probably Glossiphonia, as 

 above; vertebrate host, Emyda vittata. Infection found all over 

 Ceylon. 



