THE MYXOSPORIDIA, OR PSOROSPERMS OF FISHES. 299 
PLATE 28—Continued. 
Fig. 5.* Myxobolus cycloides (after Miiller. x1). X41. 
5a. Group of cysts, natural size. 
5d. Vertical view of broad form. 
5e. Transverse view of same. 
5f. Vertical view of elongate form. 
5g. Transverse view of same. 
Fig. 6. Myxobolus sp. 61 (atter Miiller. 1). 
6a. Vertical view of spores. 
6). Transverse view. 
6c. Rare aberrant form among the remaining normal forms in the same cyst. 
6d. Pansporoblasts with 2 spores. 
6e. Rare forms of pansporoblast containing 3 spores. 
6f. A rare method of grouping of 3 spores. 
6g. Spores with punctate borders [illusion due to the simultaneous presence in 
(approximate) focus of the supero-anterior and infero-anterior borders of 
the sporoplasm]. 
6h. Spore with developing germs (see p. 240). 
6i, k. Rare spores with 3 “vesicles.” 
61. Rare form; seen only once. 
Fig. 7. Myxobolus obesus (after Balbiani. >#). 
7a. Vertical view of spore, showing pericornual nuclei. 
7b. Vertical view of spore, showing capsules with filaments extruded, and the 
sporoplasm with its cornua, and the supero- and infero-anterior margins. 
PLATE 29, 
Fig. la-d. Myxrobolus transovalis (original). 
la-c. Vertical view showing outline, capsules, sporoplasm, vacuole, and nuclei. 
Hydrochloric acid alcohol carmine. 
1d. Transverse view showing equal convexity of valves, and the narrow ridge. 
Figs. 2-7. Myxobolus? merlucit (atter Perugia. » 1). 
2-6. Various forms of the myxosporidinm; showing also the spores, 
7. Two spores making their exit from the myxosporidium. 
Fig. 8. Myxobolus sp. 67 (after v. d. Borne. xX 1). 
8a. Group of spores. 
8b, Leuciscus rutilus with the myxosporidian tumors, 
PLATE 30. 
Fig. la-q. Myzxobolus cf. creplini showing different views of spores (after Weltner. 
x1). ap, X 528; g, x 720. All were drawn with Abbe camera; m, n, are 
optical sections at the level of posterior end of capsules; g, separate cap- 
sules; one dull and with filament still coiled; the other transparent with 
filament extruded. 
PLATE 31. 
Fig. la-e. Myxobolus 2? zschokkei (after Zschokke, Schieck Oc. 2, Obj.7. x 3). 
Vertical views of spores with extruded ‘‘tails”; also the capsules (?). 
Fig. 2. Myxobolus medius and Chloromyxum elegans. Section of tube of kidney of 
Pygosteus pungitius, showing spores of the two species surrounded by epi- 
thelium of tube. Borax carmine and gentian violet (after Thélohan. 
Bg 1D) 
Fig. 3. Myxobolus medius (original enlargement from preceding. X about 4). 
Fig. 4. Myxobolus medius. Spore in pansporoblast (after Thélohan. x 1). 
Fig. 5. Myxobolus strongylurus (after Miiller. x 1). 
5a. Vertical view. 
5b. Transverse view. 
- * For 6 and c, see Ohloromyxum dujardini, plate 40, fig. 4. 
