2/6 



It either occupies a lateral position in the red cell or a 

 polar one with much displacement of the nucleus (Fig. 

 90). The nucleus occupies about two-thirds of the cell. 

 Free forms also occur. 



8. Hg. nicoriae. In an amphibian tortoise 

 (Nicoria trijuga) in Ceylon. Young parasites are 

 reniform. These eventually become bent on them- 

 selves in the typical vermicule way. Their length is 

 then io/*. They displace the nucleus of the red cell. 

 Specific differences are hard to define. 



Other species are Hg. billeti in Trionyx stellatus. 

 Hg. labbei in Platemys sp. and Clemmys elegans, N. 

 America. 



Fig. 90. (1-3) Hg. ttepanowia ; (4-5) Hg. rara 



HAEMOGREGARINES IN FISH 



Haemogregarines and trypanosomes are often 

 found together in saltwater fish, but although trypano- 

 somes are common in freshwater fish, haemogregarines 

 are not. 



I. H. bigeniina. Discovered by Laveran in the 

 blood of blennies. A vermicule form occurs free in 

 the plasma. 



