68 



PROTOZOA. 



Fam. 2. Chloromyxidae. Spores with four polar-capsules. Chloromyxum 

 Mingazzini : C. incisum Gurley, gall-bladder Raja batis. 



Fam. 3. Myxobolidae. Almost all tissue-parasites, principally gills, spleen, 

 etc., of fishes ; one or two polar-capsules. Myxobolus Blitschli (Figs. 55-57); 

 M. piriformis Thel., gills, spleen, kidney of the tench (Tinea vulgar is) ; M. 

 dispar Thel., gills of Carp (Cyprinus rutilus) ; Henneguya Thel. ; H. psoros- 

 permica Thel., gills, eye-muscles, ovary of pike; H. media Thel., kidney 

 and ovary of stickleback. 



Fam. 4. Glugeidae. "With very small oviform spores, having at the broad 

 end a non-colourable vacuole, atf the narrow end a polar-capsule usually 

 invisible. Glugea Thel., mainly tissue -parasites ; Gl. bombycis Thel. (Micro- 

 sporidium bombycis Balb.), in all tissues of Bombyx mori, is the cause of the 

 Pebrine disease of silk-worms (Fig. 58), which between the years 1854-67 caused 

 the loss of one milliard francs to the French silk-worm industry ; combated 



by microscopical examination of eggs 

 and rejection of those infected (Pasteur 

 and Balbiani) ; Gl. bryozoides Korot- 

 neff, sexual organs and body-cavity of 

 Alcyonella fungosa ; Pleistophora Gur- 

 ley; Thelohania Henneguy, muscles 

 of Palfemon, Crangon, Astacus; Th. 

 contegeani Hen., muscles of Astacus 

 fluviatilis. 



Order 5. SARCOSPORIDIA.* 



Cylindrical intracellular para- 

 sites infestintj the striped mus- 

 cular fibres of certain vertebrates. 

 These are the so-called Mi- 

 scher's tubes, the contents of 

 which are known as Rainey's 

 Corpuscles (Fig. 59). They con- 

 tain a number of more or less 

 spherical bodies, which divide 

 up into still smaller bodies the 

 germs. These latter become 

 sickle-shaped and appear to con- 

 stitute the young. Very little 

 is known about this group. We 

 are ignorant of the manner in which the transference from host 

 to nost is effected, and of the young stages of infection. 



* Bertram, "Beitrage z. Kennt. d. Sarcosporidien. " Zool. Jahrb. Abth: f. 

 Anat., 5. Ai. Schneider, " Ophryocystis biitschlii." Arch. Zool. Exp. (2), 2, 

 1884. 



FIG. 59. Rainey's Corpuscles from the flesh 

 of a pig. a, an animal inside a muscle-fibre ; 

 b, posterior end of same strongly magnified ; 

 C cuticle ; B spores. 



