68 



PROTOZOA. 



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

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



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

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

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

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

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

 and ovary of stickleback. 



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

 end a non-colourable vacuole, at 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. bryozoidcs Korot- 

 neff, sexual organs and body-cavity of 

 Alcyonella fungosa; Pleistophora Gur- 

 ley; Thelohania Henneguy, muscles 

 of Palfemon, Crangon, Astacus; Th. 

 contcgeani Hen., muscles of Astacus 

 fluviatilis. 



Order 5. SARCOSPORIDIA.* 



Cylindrical intracellular para- 

 sites infest i-Jif/ the striped mus- 

 cular fibres of certain vertebrates. 



These are the so-called Mi- 

 sclier'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 

 enns. These latter become 



o 



sickle-shaped and appear to con- 

 stitute the young. Very little 



FIG. 59. Rainey's Corpuscles from the flesh 

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

 b, posterior end of same strongly magnified ; 

 C cuticle ; B spores. 



is known about this group. We 

 are ignorant of the manner in which the transference from host 

 to iiost 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. 



