182 REPORT OF THE COMMISSIONER OF FISH AND FISHERIES. 



into globules (pansporoblasts) every one of which contains 2 spores or 

 perhaps only faint indications of such. 



Spore. — Xot described. 



Habitat. — On branchiae of Perca fliiviatilis L. (yellow perch). 



9. Genus et sp. incert. PI. 6, fig. 1. 



Myxosporidium of Lota vuUjaris, Lieberklibn in Biitsclili, 1882. Bronn's Tbier- 

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

 No description. 

 Rahitat. — Gall-bladder of Lota lota L. {=')mlgaris), ling. 



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



Myxosporidium of Lota vulgaris Lieberkilhu in Biitsclili, 1882, Bronn's Thier- 

 Reich, I, pi. 38, tig. 24. 



No description. 



Hahiiat. — Branchite of Lota lota L. {=vulgaris), ling. 



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



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

 ih., Theloban, 1892, Bull. Soc. pbilomat. Paris, iv/p. 166; Chlorovnjxum ?f 

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

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

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

 consisting of fungus (probably Penicillium), 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. 



Sahitat. — Gall-bladder of Leptoceplialus conger [=zConger 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 Notrojiis megalops, Linton, Bull. U. S. Fisb Com. for 1889 (1891), 

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

 siteukde, 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 tapering to a point, length 17 j.r, breadth 10 //; thick- 

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

 sulphuric acid and of potassium hydrate solution; shape not changed by 

 those reagents, by acetic acid or by glycerin, not staiuing 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. 



