294 REPORT OF THE COMMISSIONER OF FISH AND FISHERIES. 
PLaTE 12—Continued. 
Fig. 2. Pathological anatomy (x 1). Longitudinal section of diseased muscle of 
Crangou vulgaris, Showing fibrille with normal aspect preserved, and pan- 
sporoblasts in different stages of development, and spores. 
Fig. 3. Thelohania macrocystis (after Garbini. xX 1). 
3a-c. Sporophorous vesicle and spores. 
3d, Spores. 
de. A section of the diseased tissue. 
PLATE 15 
Fig. 1. Myxobolus unicapsulatus (after Miiller. x 1). 
la, b. Vertical view of spores, showing the single capsule and the sporoplasm. 
le. Vertical view of spore, showing sporoplasm (and vacuole ?). 
ld. ‘Transverse view of spores. 
Fig. 2. AWyrobolus inequalis (after Miiller. 1). 
2a. Vertical view, showing the unequal capsules and the sporoplasm. 
2b. Transverse view. 
Fig. 3. Myxobolus piriformis and M. ellipsoides. Spores highly magnified from 
alee corpuscles of spleen of Tinca tinca (after Balbiani. x 1). 
3A. Nos. 1, 2,6, Myxobolus piriformis? (see p. 211, footnote 1), showing ube elon- 
gate py riform outline and the single capsule. 
Nos. 3, 4,5, 7, Myxobolus ellipsoides? (See p. 211, footnote 1). 
3B, C. Myxobolus piriformis or M, ellipsoides (which?). 
Fig. 4 . “‘Degenerated forms” from the spleen, liver, and kidney of Tinea tinca ‘(after 
Balbiani. x 3). 
4a. Myxobolus ellipsoides? (see p. 211). 
4b, c. Myxobolus piriformis (see p. 211). 
4d-f. Myxobolus piriformis or M. ellipsoides (which?). 
PLATE 14. 
Figs. 1-3. Myxobolus brachycystis (after Remak). 
1. Pigment follicle from spleen of Tinca tinea, containing 3 ‘‘ vesicles” [pansporo- 
blasts], each with a pyriform spore. To the right some of the pigment-con- 
taining vesicles which fill the cyst. (All fide Remak. ~<a) x20: 
2. Three oval vesicles with pyriform spores from the kidney of 7. tinca (x #). 
x 375. 
2a. Showing spores and numerous pigment cells. 
2b. Showing 2 smaller vesicles, each with a pyriform spore. 
2c. A vesicle showing conspicuous thickenings of its wall. 
3. Vertical view of 2 pyriform spores with 2 capsules from tubiform cysts of the 
spleen of 7. tinca. Similar spores are also found onthe branchiz and in the 
kidneys. (All fide Remak. x 3.) xX 675. 
Fig. 4a-g. Myxobolus? sp. 38 (after Lieberkiihn. x 3). xX 675. 
4a. Vertical view of spore. 
4b-d. Spore in act of giving exit to sporoplasm. 
4e-g. Free sporoplasmata of spores. 
Figs. 5,6. Myxobolus? mugilis (after Perugia. > 1). 
5. Branchial lamella of Mugil auratus with cysts. « 
6. Vertical view of spore. 
Fig. 7. Myxobolus sp. 40 (after Lieberkiihn in Biitschli. x 3). X about 1050. 
Ta. Vertical view. 
7b. Transverse view. 
Figs. 8a-d. Myxobolus oviformis. From cyst of fins of Gobio gobio; safranin and gen- 
tian violet (after Thélohan. xX 1). 
8b. Vertical view of spore showing 1 nucleus. 
8c. Same, with 2 nuclei. 
8d. Same, with 3 nuclei. ® 
