HAPLOSPORIDIA 



773 



The following species have been described: 



G. leuckarti 

 G. gilruthi 

 G. besnoiti 

 G. mucosa' 



G. {Ileocjjstis) rnacropodis 

 G. sp. {Lympliocystis macro- 



podis) 

 G. sp. {Sarcocystis macro- 



podis) 

 G. ivombati 



G. tat us i 



Flescli, 1883 

 Chatton, 1910 

 Marotel, 1912 

 Blanchard, 1885 



Horse 



Sheep and goat 

 Cattle 



Kangaroo {Macropus peni- 

 cillatus) 



CTilrutli and Bull, 1912 Kangaroo [Macropus sp.) 



Gilruth and Bull, 1912 Wallaby [Petrogale sp.) 



Gilruth and Bull, 1912 Wombat {Phascolomys lati- 



frons) 

 ( 'unlia and Torres, 1 923 Armadillo 



Under the name of Fihrocystis tarandi, Hadwen (1922) describes certain 

 cysts which occur in the fibrous tissue, especially that covering the tendons 

 and the periosteum, of the reindeer and caribou. The cysts have a 

 diameter of 100 to 450 microns, and consist of three layers enclosing 

 numerous spores. In the reindeer it gives rise to a condition known as 

 " corn-meal disease," on account of the gritty feel of the affected parts. 

 When in the periosteum, the cysts cause the bone to atrophy, so that it 

 becomes pitted. Both the reindeer and the caribou suffer from sarco- 

 sporidiosis of the muscles, and though the cysts of F. tarandi differ 

 structurally from the Sarcosporiida, which resemble those of sheep, this 

 difference may be due to their development in the fibrous tissue. 



Haplosporidia Liihe, 1900. 

 Under this heading are included a number of parasites which in many 

 respects resemble the Microsporidiida. They are found in aquatic inverte- 

 brates and fish, and occur as small uninucleated amoeboid bodies or as 

 multinucleate plasmodia. They float freely in the body-cavity fluid of 

 the invertebrates, or infest the cells such as those of the intestine. In 

 fish they attack the gills or other tissues, giving rise to white nodules. 

 After growth and multiplication have taken place spores are produced, 

 but these are not provided with polar capsules. The spore is spherical or 

 ovoid, and the surface may be variously marked with ridges or tubercles. 

 In some cases it is provided with a tail-like process. The genus Bertramia, 

 established by Caullery and Mesnil (1899), includes forms which are 

 parasitic in the body-cavity fluids of aquatic worms and rotifers. The 

 minute uninucleate body develops into a cylindrical or sausage-shaped 

 Plasmodium containing many nuclei. It finally divides into a number of 

 uninucleate forms. Roughly spherical and irregularly marked spores are 

 produced. The genus Ichthijosporidium Caullery and Mesnil (1905) includes 

 several species which infect fish. As in the case of Microsporidiida, white 

 nodules are produced in the tissues or on the gills, and these are seen to 



