THE MYXOSPORIDIA, OR PSOROSPERMS OF FISHES. 293 
PLATE 10. 
Figs. 1-3. Glugea anomala. 
la-h. (After Gluge. x 1.) ? 
la, ». Showing Gasterosteus aculeatus with tumors on sides of body and on tail. 
Sele 
1c-e. Spores variously magnified. XX 255-840. 
1f, g. The same “coagulated.” 
1h. Cyst membrane. 
2. Section showing, from above downward, subcutaneous connective tissue, cyst 
membrane, protoplasmic contents of cyst, and spores (after Thélohan. X 1). 
3a-i. Group of spores: a, b, fresh; c-i, safranin stained; c, d, spores with 1 
nucleus; e, f, with 2 nuclei; g, with 3; h, i, with 4 (after Thélohan.  X 1). 
Figs. 4-5. Thelohania contejeani (after Henneguy and Thélohan). 
4, Longitudinal section of diseased craytish muscle (X 1). 
5a. Spores in sporophorous vesicle, and free (X #). 
5b. Individual spore, more highly magnified (xX 2). 
Fig. 6. Thelohania octospora (after Henneguy. X 1). 
6a. Sporophorous vesicle with spores. 
6b. Individual spores. 
6c. Longitudinal section of diseased muscle of Palawmon rectirostris, showing 
sporophorous vesicles between the separated fibrille. 
6d. Portion of c more highly magnified. 
PLATE 11. 
Figs. 1-5. Thelohania octospora (after Henneguy and Thélohan. xX 1 except fig.5). 
1. Transverse section of entire abdomen of a badly diseased Palemon rectirostris, 
showing, opposite the letters, the following: m,m, affected muscles; dt, diges- 
tive tube; n, nerve cord; cl, sections of the claws. 
2. Longitudinal section of muscle showing the dissociation of the fibrillx. 
3. Transverse section of diseased muscle. 
4, A part of fig. 2, more highly magnified, showing fibrille with very clear stria- 
_ tion, and the sporophorous vesicles. 
5a-d. Showing the spores: 6, in the fresh state showing the vacuole; a, ¢, d, 
after action of ether; a, with the filament partially, c and d with it com- 
pletely, extruded (xX $). 
PLATE 12. 
Figs. 1-2. Thelohania giardi (after Henneguy and Thélohan). 
1. Spore formation (x #). 
la. Young pansporoblast. 
1b. Pansporoblast whose nucleus has lost its membrane and presents itself under 
the form of an equatorial plate. 
1c. Pansporoblast whose nucleus has segmented into 2. 
1d. Pansporoblast the protoplasm of which has segmented into 2 uninucleate 
plasma hemispheres. 
le. Pansporoblast in the Iv stage; fresh state. 
1f. Pansporoblast in the 1v stage, the augumentation of size of nuclei and change 
in disposition of chromatin preliminary to division. 
1g. Pansporoblast in the Iv stage; nucleus in repose. 
1h, i. Pansporoblast in the vit stage; different dispositions of the sporoblasts 
(the 8th in 7 is not represented, being hidden by the others). 
lz. Sporophorous vesicle inclosing 8 ripe spores. 
1l, Pansporoblast inuclosing 4 normal spores, and 2 bodies each formed by the 
soldering together of 2 spores by their large ends: a, thickening of the pan- 
sporoblast membrane; b, spores soldered; s, normal spores. 
Im, n. 2 sporoblasts with crescentic nucleus. In the concavity of the latter, a 
clear vacuole. At asmall protoplasmic button projects into the vacuole. 
lo. Spores in fresh state showing at the large end a clear vacuole and at thesmall, 
a brilliant point corresponding to the capsule. 
1p. Spores showing the vacuole and the lengitudinal shell-strie. 
1g, r. Spores after action of sulphuric acid: gq, filament incompletely unrolled; 
r, filament completely unrolled. 
