2991) REPORT OF THE COMMISSIONER OF FISH AND FISHERIES. 
‘“Granules.”—Biitschli summarizes his results thus: 
There are very constantly found in the protoplasm 2, or sometimes more, strongly 
refractile glittering granules of a roundish form, They are usually, though by no 
means always, situated tolerably symmetrically, just at the posterior ends of the 
polar capsules. No decided regularity obtains either as regards the number or 
position of the granules, as they are sometimes placed farther forward between the 
capsules, and sometimes are strewn entirely irregularly through the plasma. 
I have also observed, with longer preservation of the spore in water, an appearance 
which was not clearly intelligible, but which I will briefly describe. In spores so 
preserved one sees after some time nothing more of the 2 dark granules usually 
present, but on the other hand one sees on cach polar capsule posteriorly a dark 
punctule which occupies nearly the same position as the above-mentioned granule. 
It gives the impression as though the dark granule had fused with the capsular mem- 
brane and had developed into the punctule. I must, however, regard the interpreta- 
tion mentioned as a mere conjecture. 
Effects —Invades the connective tissue and ovules of Phoxinus phoxt- 
nus (Thélohan, 1892). 
Habitat—Branchize of various cyprinoids, particularly Leuciseus 
(Squalius) cephalus L.; Barbus barbus L. (barbel), both jfide Biitschli. 
Fins of L. cephalus; kidney and ovary of Phovinus phoxinus L., and on 
Crenilabrus melops at Roscotf (Thélohan). 
47. Myxobolus? sp. incert. 
Psorosperm (second species) of Platystoma fasciatum Miiller, 1841, Miiller’s 
Archiy., p. 489. 
Cyst and myxosporidium unknown. 
Spore.—Oval, untailed; size equals that of M. sp. 61. 
Habitat.—On branchial arches (especially at their angles where the 
mucous membrane is soft) of Pseudoplatystoma fasciatum. 
48. Myxobolus bicostatus Gurley, 1893. 1.19, fig. 1. 
(Myxosporidian spore of Tinca vulgaris, Lieberkiihn in Biitschli, 1882, Bronn’s 
Thier-Reich, 1, pl. 38, fig. 19.) 
Myxobolus bicostatus, Bull. U. S. Fish Com. for 1891, x1, p. 414; ib. Braun, 1894, 
Centralbl. f. Bakt. u. Parasitenkde, xv, p. 87. 
No description. 
Habitat.—Branchie of Tinea tinca L. (=vtlgaris), tench. 
This species is distinguished from M. ellipsoides by its larger capsular 
index (0-50 as against 0°33 in IM. ellipsoides) and by the 2 oblique ribs 
ov the shell. 
