182 EEPORT OF THE COMMISSIONER OF FISH AND FISHERIES. 



into g'lobules (])misporoblasts) every one of wliicli contains 2 spores or 

 perliaps only faint indications of sncli. 



Sjtore. — Not described. 



llahitat. — On branchiae of Perca Jliiviatilis L. (yellow perch). 



9. Genus et sp. incert. PI. 6, fit;". 1. 



Myxosporitlinm of Lota vidijKrifi, Lieberkiilin in Biitsclili, 1882. Bronn's Tliier- 

 Reicli, I, pi. 38, fig. 20. 



No description. 



Hahitat. — Gall-bladder of Lota lota L. { = vnl(/aris), ling. 



10. Genus et sp. incert. PI. 6, fig. 2. 



Myxosporidinm of Lo(a vi(I(faris Lieberkiilin in Biitschli, 1882, Bronn's Tliier- 

 Reich, I, pi. 38, fig. 24. 

 No description. 

 Habitat. — Branchiic of Lota lota L. {=vulgaris)^ Ibig. 



11. Genus incert. ("Myxosporidium") congri Perugia, 1891. PI. 6, figs. 3-8. 



Myxosporidium coiif/ri Perugia, Boll. Scientif., Pavia, xiii, pp. 24-5, figs. 15-20; 

 ib., Tbeloban, 1892, Bull. Soc. pbilomat. Paris, iv, p. 166; Chloroinj/xum ff 

 congri, Gurley, 1893, Bull. U. S. Fisb Com. for 1891, xi, p. 419; ih., Braun, 

 1894, Centralbl. f. Bakt. u. Parasiteukde, xv, p. 87. 



Myxosporidium. — Found attached to a calculus-like compact mass 

 consisting of fungus (probably FcnicilUum), bacteria, and crystals. 

 Individuals numerous, form variable, movements incessant, slow, amoe- 

 boid. Perugia observed in some a clear space which he believed to 

 be a '< vacuole " (pansporoblast), but careful examination failed to detect 

 the spores. 



Hahitat. — Gall-bladder of Leptocephalits conger {=Conger vulgaris), 

 eel, collected in August, 1890. 



The generic name Myxosporidium is not in good standing (see p. 206). 

 In the absence of knowledge of the spores the generic reference of this 

 form is entirely uncertain. 



12. Genus et sp. incert. PI. 7, figs. 1-3. 



Psorosperm of Notropis megalopn, Linton, Bull. U. S. Fisb Com. for 1889 (1891), 

 IX, pp. 359-61, pi. 120, figs. 1-3; ib. Braun, 1893, Centralbl. f. Bakt. u. Para- 

 sitenkde, xiii, p. 97. 



Cyst. — Globular, discrete or aggregated into clusters, white, with 

 minute patches of black pigment from host; size varying from 2-5 mm. 

 (single cysts) to 7 by 5 mm. (clusters); wall composed of connective 

 tissue, thin, collapsing when punctured, indistinguishable from deeper 

 layers of derma, staining deeply with ammonia-carmine. Contents, a 

 milky fluid. 



Myxosporidium unknown. 



,Spore. — Somewhat top-shaped, one end broadly rounded, slightly flat- 

 tened, the other tai^ering to a point, length 17 /<; breadth 10 /<; thick- 

 ness 6 1.1. Shell, thick and strong, resisting for a long time the action of 

 sulphuric acid and of potassium hy<lrate solution ; sliape not changed by 

 those reagents, by acetic acid or by glycerin, not staining with carmine; 

 showing when viewed on edge an elevated ridge [junction of valves?]. 

 Capsules could not be detected. Protoplasmic contents appear in most 

 cases to be finely granular. Tail absent. 



