300 REPORT OF THE COMMISSIONER OF FISH AND FISHERIES. 
PLATE 32. 
Figs. 1, 2. Myxobolus creplini. 
la-e. (After Creplin. xX 1.) 
la, b. Vertical view of spores. 
lc. Transverse view. 
1d. Vertical view (of an illusory appearance? See p.249). The larger size of 
this figure merely represents higher magnification. 
le. Transverse view of spore with the valves gaping anteriorly. 
2. Vertical view of spore (after Leuckart. x 1). 
Figs. 3, 4. Myxobolus monurus (after Ryder. X 8). 
3a. Aphredoderus sayanus with tumors. 
3b. Cyst, much enlarged. 
3c. Vertical views of 2 spores, showing capsules and tails. 
4b-d. * Vertical views of spores. 
Fig. 5. Myxobolus macrurus (original). Vertical view of spore, showing capsules, 
sporoplasm with vacuole and 3 nuclei (2 the pericornual), and the full length 
of the tail (about 4 times that of the body). 
PLATE 33. 
Figs. 1-4. Myxobolus macrurus (original). 
1. Transverse view showing, on the right side, the more convex superior valve 
and the greater anterior projection of the supero-median cornu; on the left, 
the less convex inferior valve; along the center, the narrow ridge. 
2. Vertical view, showing the vacuole and nuclei. ; 
3. The same, showing aiso the beading of the tail after the action of iodine. 
4, A tail separated from the body by iodine. 
Figs. 5-8. Myxobolus ef. linearis (original). 
5. Vertical view, showing divergence of valves under action of sulphuric acid, 
and the tail separating into a superior and an inferior half. 
6. Transverse view, showing supero-inferior syminetry and narrow ridge. 
7. Vertical view of unstained spore, showing vacuole. 
8a-d. Vertical views of spores, showing vacuole, nuclei, and flexibility of tail. 
Hydrochloric acid alcohol carmine. 
PLATE 34 
Figs. 1-4. Myxobolus psorospermicus. 
1. From branchie of Perca fluviatilis (after Lieberkiihn in Biitschli. x #). 
x about 975. 
la. Vertical view of spore with a simple tail. 
1b. Transverse view of same. 
le. Vertical view of spore with a double tail. 
2a-c. From a branchial cyst of P. fluviatilis, showing capsules, sporoplasm, 
vacuole, and nuclei. a, with 1 nucleus; b, with 2 nuclei; ¢, with 3 nuclei. 
Carmine and gentian violet (after Thélohan. x 1). 
3a-d. Spores from Perca fluviatilis (after Balbiani. xX $). 
3a. Vertical view. 
3b. Transverse view of spore with 2 tails. 
3c. Form slightly abnormal. 
3d. Vertical view of spore, showing capsule with filaments extrudea, cornua o- 
sporoplasm, and pericornual nuclei. 
4. Spores from Lucius lucius (after Balbiani. x $). 
4a. Vertical view. 
4b. Transverse view. 
4c. Spore with valves separating to permit exit of sporoplasm 
4d. Vertical view showing filaments extruded, and cornua of sporoplasm. 
PLATE 35, 
Figs. 1-7. Myxobolus kolesnikovi (after Kolesnikoff). 
1-6. Cysts (xX 1). : 
7a-o. Spores showing extruded filaments and single and double tails (xX $). 
7g. Separated capsule with extruded filament. 
* No a to this figure. 
