THE MYXOSPORIDIA, OR PSOROSPERMS OF FISHES. 299 



Plate 28 — Continued. 



Fig. 5.* Mjirohohift ri/rhideii (after Aliiller. X 1). X 1. 



5a. Group of cysts, uatural size. 



orf. Vertical view of broad form. 



5e. Transverse view of same. 



5/. Vertical view of elongate form. 



5<j. Transverse view of same. 

 Fig. 6. Mi/xoholus sp. 61 (after Miiller. x l)i 



6a. Vertical view of spores. 



&>. Transverse view. 



6c. Rare aberrant form among the remaining normal forms in the same cyst. 



6d. Pansporoblasts with 2 sjiores. 



6e. Rare forms of pansporoblast containing 3 spores, 



6/. A rare method of grouping of 3 spores. 



6g. Spores with punctate borders [illusion due to the simtxltaneoils presence in 

 (approximate) focus of the supero-autcrior and iufero-anterior borders of 

 the sporoplasm]. 



6h. Spore with developing germs (see p. 210). 



6(, k. Rare spores with 3 "vesicles." 



61, Rare form; seen only once. 

 Fig. 7. Myxobolux ohestts {niter BiiWnani. X?.). 



la. Vertical view of spore, showing pericornual nuclei. 



Ih. Vertical view of sj)ore, showing capsnh^s with (ihuncnts extruded, and the 

 eporoplasm with its cornua, and the supero- and infcro-anterior margins. 



Plate 29. 



Fig. \a-(l. Mii.rohnhis fronsoralis (original). 



la-o. Vertical view showing outline, capsules, sporoplasm, vacuole, and nuclei. 

 Hydrochloric acid alcohol carmine. 



Id. Transverse view showing equal cimvexity of valves, and the narrow ridge. 

 Figs. 2-7. .l///j'«ftw/H«f »iC7-?//c»i (after i^erugia. x 1). 



2-6. Various forms of the myxosporidium; showing also the spores. 



7. Two spores making their exit from the myxosporidium. 

 Fig. 8. Mi/xobolus sp. 67 (after v. d. Borne. X 1). 



Sa. Group of spores. 



Sb. Leuclseus ruUluts with the myxosporidian tumors. 



Plate 30. 



Fig. \a-q. Mijxohnlu^ cf. rrepJhii showing diflVront views of spores (after Weltner. 

 X 1). a-p, X 528; </, X 720. All were drawn with Abbe camera; »j, »(, are 

 optical sections at the level of posterior end of capsules; q, separate cap- 

 sules; one dull and with filament still coiled; the other transparent with 

 filament extruded. 



Plate 31. 



Fig. la-c. Mf/rohohta '^f zsclwlckei (after Zschokke, Schieclc Oc. 2, Obj. 7. X ?). 

 Vertical views of s])ores with extruded "tails"; also the capsules (?). 



Fig. 2. Ali/xoholiis vicdiits aud Chloromi/xwm elegant. Section of tube of kidney of 

 ripjoateuH pniuixiUis, showing 8])ores of the two species surrounded by epi- 

 thelium of tube. Borax carmine and gentian violet (after Thclohan. 

 X 1). 



Fig. 3. Afjixobolus medius (original enlargement from preceding. X about 4). 



Fig. 4. MifxohohiH viedius. Spore in pansporoblast (after Thelohan. X 1). 



Fig. 5. Myxoboliis strongi/luruH (aiteTMUlieT. X 1). 

 5a. Vertical view. 

 56. Transverse view. 



* For b and c, see Ohloromyxum dujardini, plate 40, flj;. 4. 



