Enteritis in Native Anitnals. 445 



fied gland cell. He points out that many greg-arines and coccidia 

 produce great hypertrophy of affected cells, and so far as the 

 " brush " is concerned recalls that Mrazek maintains this is so in 

 the lymphocytes of Oligoclietes infected by Microsporidia, and 

 that according to him the myxocystis of which the characteris- 

 tics are a superficial brush, and two kinds of nuclei, is in reality 

 a complex body formed by a lymphocyte greatly hypertrophied, 

 and by the microsporidium, to the lymphocyte belonging the 

 fundamental mass of the myxocysts, the large nuclei and the peri- 

 pheral fringe, while to the microsporidium belong the small 

 elements and the spores derived therefrom. 



There are many resemblances between the sarcosporidia, and 

 the cysts we have described as well as the Gastrocystis c/ilruthi. 

 The sarcosporidia in the pig (tSarcoci/stis miescheri) also possess 

 a peripheral " fringe," even in the mature cyst. There is also 

 great similarity between the mature merozoites of these parasites 

 and the falciform corpuscles of the sarcocystis, even greater than 

 between the latter and those of the G. gilruthi. 



Summapy. 



In this communication what appear to be four varieties of 

 pathogenic neosporidia are described as seen in intestinal affec- 

 tions of three different genera of native fauna. 



1. In the wallaby the Y>^Y^^\te {Sarcocystis macropodis)\^ situated 

 in the submucosa,and is surrounded by chronic inflammatory tissue. 

 It is composed of an envelope with fringed periphery, and an endo- 

 plasm separating the blastophores, which in the earlier stages are 

 composed of nuclei arranged peripherally around masses of pro- 

 toplasm, and in the later stages of mature spores, similar to 

 those of sarcosporidia. No nucleus of an original tissue cell can 

 be detected. But assuming the cyst to be derived from an 

 invaded body ceil greatly hypertrophied, this cell does not 

 appear likely to be epithelial in character, but probably a lymph 

 or endothelial corpuscle. As in Balhiania the origin may be a 

 muscle fibre, but the sections do not support such a view. 



2. In the kangaroo there are apparently two parasites. The larger 

 Ileocystis wiftcro/joo^i^ are generally present in groups. Eachpossesses 

 an envelope with a regular fringe at the periphery, and a small 



