MYXOSPORIDIA. 



67 



Fam. 1. Myxididae. Spores variously formed with two polar-capsules; 

 includes the forms least degenerated by parasitic life. Principally in gall- 

 bladder and kidney tubes of fishes and amphibia. Leptotheca Thelohan (Fig. 

 54), gall-bladder or kidney of various fishes and amphibia; Ceratomyxa, Thel., 

 gall-bladder of fishes ; Sphcerospora Thel., kidney-tubes of fishes, S. Regans 

 Thel., kidney- tubes and ovary of stickleback ; Myxidium Butschli, M. lieberkuhni 

 Butschli, urinary bladder of pike ; Sphceromyxa Thel. ; Myxosoma Thel. 



abed 

 FIG. 56. Polar-capsules of Myxobolus 

 ellipsoides. a, polar -capsule with 

 spirally-coiled thread ; b, c, d, eversion 

 of the fibre (after Balbiani). 



a b 



FIG. 57. Spores of Myxobolus ellipsoides 

 (after Balbiani), showing polar-cap- 

 sules in b the threads are everted. 



FIG. 5S.Glngea bombycis (after Balbiani). a, ripe >pore ; b, c, hatching o. amoeboid young ; 

 d, e, growth stages ; /, g, h, sporulation ; i, testis-follicle of silk-worm caterpillar, strongly 

 infested with Glugea ; A;, I, two infected stomach-epithelial cells of the caterpillar of Attacus 

 (Saturnia) pernyi ; k, beginning of infection ; I, the cell is completely filled with spores. 



