80 



SPOROZOA. 



The young intracellular stage occurs in a cell of the intestinal 

 epithehum of the larva of a sand-fly (Phlebotomus) , and is at 

 first spherical, but later becomes more or less triangular, with 

 rounded angles, measurmg about 23-4ju, in length when 

 about to leave the host-cell. The adult Gregarine occurs in 

 the lumen of the gut or body-cavity of the larva, but only in 

 the body- cavity of the pupae and the adult fly. It is egg-shaped 

 or pear-shaped, but it can voluntarily lengthen or shorten 

 the body and is considerably compressible. Epicyte well 

 developed and marked with longitudinal striations. Endo- 

 plasm very markedly granular. Nucleus a large spherical 



Fig. 24. 



Fig. 23. 



Fig. 23. — Lankesteria mackei (Short & Swaminath). (After Short & 



Swaminath.) 

 Fig. 24. — Lankesteria tripteroidesi, sp. nov. (After Guenther.) 



or subspherical body, measuring about SO fi in its longest 

 diameter, eccentrically placed, with a large densely- staining 

 spherical or subspherical karyosome, measuring 8-10 /x in dia- 

 meter. Gametocj/tes somewhat elongated and crescent- 

 shaped, with blunt extremities. They are similar, and a pair 

 become apposed and surrounded by a cyst. Gametocysts 

 spherical or broadly oval. Hundreds of gametes are formed 

 in each gametocyte and are similar in form and size. Zygotes 



