912 REPORT OF THE COMMISSIONER OF FISH AND FISHERIES. 
of the spleen and the noncapsulate spores (developing spores; sporo- 
blasts), also from the spleen, shown in Remak’s fig. 5. And, finally, 
between the immature forms of fig. 5 from the spleen and the similarly 
immature forms from the kidney represented in Remak’s fig. 7, specific 
identity seems almost certain. Another argument which is especially 
worthy of note is the fact that the spores represented in all 3 figures 
are almost exactly the same size. Remak does not, it is true, state the 
dimensions in the text, but on the plate he gives the multiplication 
ratio for the figures, and calculations from careful neasurements of them 
show that all of them agree very closely. I therefore think, with 
Remak, that they are all one species. 
(>) That species is distinet from M. piriformis. Among the 3 criteria 
cited by Thélohan as distinguishing M. brachycystis from A. piriformis, 
viz, spore-form, presence of 2 capsules and their small size, especial 
emphasis should be laid upon the latter, that is upon the small capsular 
index. 
Cyst and myxosporidium unknown. 
Spore.—Pyriform; closely resembling a pumpkin seed; being flat- 
tened-ovoid with a very acutely prior aceee extremity. 
Length, 16 to 18 4; greatest breadth, 7 or 8 yu. 
Habitat.—Branchie and spleen of Tinea tinca L.; kidney of Misgur- 
nus fossilis. 
36. Myxobolus inequalis Gurley, 1893. PI. 13, fig. 2. 
(Psorosperms of Pimelodus blochii Valenc., Miiller, 1841, Miiller’s Archiv., p 
487, pl. 16, fig. 6a, b; ib. Mtiller, 1843, Rayer’s Archiv. de Méd. comp., pl. 9, 
fig.6; ib. Robin, 1853, Hist. Nat. des Végét. Parasites, p. 299, pl. 14, fig. 8.) 
Myzxobolus inequalis, Bull. U. 8S. Fish Com. for 1891, x1, p. 414; Myrobolus 
inequalis [error] of Pimelodes [error] blochii, Braun, 1894, Centralbl. f. 
Bakt. u. Parasitenkde, Xv, p. 87. 
Cyst and myxosporidium unknown. 
Spore.—Length, 11 yp (0:0052/’); breadth, 7p (0-0933'); capsules 2 
of unequal size. 
Habitat—On Pimelodus clarias Bloch (= Stlurus clurias Valence.) 
from Guiana and Surinam. 
37. Myxcbolus brachycystis sp. nov. Pl. 1, figs. 1-3. 
(Psorosperms of Tinca chrysitis, Remak, 1852, Miiller’s Archiv., pp. 144-146, pl. 5, 
figs. 5, 7, 8.) 
Compare carefully p. 211. Remak compares it (by reference to Miil- 
ler’s figures) to Chloromyxum dujardini. 
Spore formation.—Pansporoblast: Oval vesicles usually situated on 
the walls of the blood vessels of the kidney or spleen; either in connec- 
tion with, or separate from, the pigment follicles; pansporoblast always 
monosporogenetic. In the developing spores Remak not infrequently 
missed the capsules, but comparison with developed forms which 
occurred in other eases left no doubt as to their nature, 
Spore.—Pyriform, long drawn out. 
Habitat.—Remak gives this as the pigment follicles of the spleen and 
