270 



7. H. tunisiensis. In Bufo mauritanicus. (i) 

 Vermicule form. The two limbs of the vermicule 

 are equal ; the vermicule is encysted ; at one end of 

 the cyst is a deep staining mass. According to Billet 

 there is a second cyst included in the first. This 

 second cyst shows stippling with Romanowsky, but the 

 red cell is not hypertrophied. (ii) Elongated halter- 

 form, i8//, by 4-5/11. Parasites are especially abundant 

 in the liver. 



/ Z. 



Fig. 84. (i) Hg. theileri ; (2) Hg. neireti 



Other species are H. enca-psulata in R. tigrina, and 



R. limnocharis in India. H. tritonis in Triton cristatus ; 

 H. damatae and H. castebianae in frogs in U.S.A., 

 and H. riedyi in a Californian salamander (Batrachoseps 

 attenuatus). 



HAEMOGREGARINES IN SAURIANS 



i. H. lacertarum (= Karyolysus lacertarum) 

 (Fig. 88). Found in the blood of Lacerta agilis, L. 

 muralis, and L. ocellata. 



The parasite 'has a more compact form than some 

 of the other haemogregarines. They exert a marked 

 action on the red cells, which become much enlarged 



