THE MYXOSPORIDIA, OR PSOKOSPERMS OF FISHES. 



191 



I. GLUGEA Thclohaii, 1891. 

 Etymology: Gluge. 



Compt. Rend, hebdom. Soc. Biol. Paris, iii, p. 29; Gluegn [error] Th^lohan, 

 1891, Compt. Rend. Acad. Sci. Paris, cxii, p. 171; ib. Tlullohan, 1891, Jonru. 

 de Microgr., Paris, XV, p. 147; Glugea Thelohun, 1892, Bnll. Soc. philomat. 

 Paris, IV, p. 174; lb. Henneguy and Th^lohan, 1892, Aun.al. de Microgr., 

 IV, pp. 630, 636 ; ih. Gurley, 1893, Bnll. U. S. Fish Com. for 1891, xi, p. 409 ; ib. 

 Braun, 1893, Centralbl. f. Bakt. u. Parasitenkde, xiv, p. 739 ; i^. Braun, 1894, 

 ibid., XV, p. 86. 



Definition. — Glugeidce possessing a myxosporidium, and in wliich the 

 pansporoblast produces an inconstant but large number (always more 

 than 8) of spores; pansporoblast membrane not subpersistentj type, 

 G. microspora Thol. (synonym for anomala Mouiez). 



27. Glugea destruens Th^lohan, 1892. 



Cyst none. 



Myxosporidium. — Ectoplasm and endoplasm recognizable. 



Spore formation. — Pansporoblast membrane thin, disapijearing soon 

 after spore formation. Sporoblasts, consisting of small globules with 

 clear nuclei, sometimes disposed in very great numbers, sometimes iso- 

 lated in groups of 4, 10, or 12 within the pansporoblast membrane. 



Spore. — A little smaller than the similar i)arasite of Cottus scorpio, 

 2-5 to 3 /^ long; 1 to 1-5 /abroad; characters otherwise identical (The- 

 lohan, 1891). Length, 3 to 3-5 /<; breadth, 2 f.i (Thelohan, 1892, p. 174). 

 Capsule present (Henneguy «& Thelohan, p. 619). 



Habitat. — Upon section of the muscles affected, the parasite is seen 

 to have its seat in the interior of even the i)rimitive fibrilloe of the 

 muscles of Callionymus lyra. Not encysted, but forming a parasitic 

 mass, destitute of an envelope, in which ripe spores are seen with 

 others in course of development. 



Effects. — Unlike the otherwise very similar condition in Cottus scorpio, 

 the muscular fibers soou break up and undergo vitreous degeneration, 



