G3S 



PROTOZOOLOGY 



B. capitellae C. and M. In the annelid Capitella capitata; spores 

 2.5/x in diameter. 



B. euchlanis Konsuloff. In coelom of rotifers belonging to the 

 genus Euchlanis. 



Genus Ichthyosporidium Caullery and Mesnil. In fish; often 

 looked upon as Microsporidia, as the organism develops into large 

 bodies in body muscles, connective tissue, or gills, which appear as 

 conspicuous "cysts," that are surrounded by a thick wall and con- 

 tain numerous spores. 



/. giganteum (Thelohan) (Fig. 271). In various organs of Creni- 

 labrus melops and C. ocellatus; cysts 30m-2 mm. in diameter; spores 

 5-8/i long. 



I. hertwigi Swarczewsky. In Crenilabrus paro; cysts 3-4 mm. in 

 diameter in gills; spores 6m long. 



Genus Coelosporidium Mesnil and Marchoux. In coelom of Cla- 

 docera or Malpighian tubules of cockroach; body small, forming 

 cysts; spores resemble microsporidian spores; but without a polar 

 filament. 



C. periplanetae (Lutz and Splendore) (C. blattellae Crawley) (Fig. 

 272, 1, m). In lumen of Malpighian tubules of cockroaches; common; 

 spores 5.5-7. 5/x by 3-4^. Cytology (Sprague, 1940). 



Order 2 Sarcosporidia Balbiani 



These organisms are muscle parasites of mammals, birds and rep- 

 tiles. The infected host muscles are characterized by the presence of 

 opaque white bodies (Miescher's tubes) (Fig. 273) which vary from 

 microscopic to several centimeters in length, and are cylindrical, 

 ellipsoid or ovoid, with a somewhat lobulated surface. When mature, 

 the parasite becomes- filled with the "spores" or Rainey's corpuscles 

 which are crescentic or banana-shaped. They contain a nucleus and 

 many granules, surrounded by a very delicate membrane (Fig. 274). 



The morphological peculiarity and lack of information concerning 

 their transmission and development have characterized these organ- 



Fig. 273. a, Sarcocystis tenella in the oesophagus of sheep; b, S. miescheri- 

 ana in the muscle of pig; XI (Schneidemuhl from Doflein). 



