220 REPORT OF THE COMMISSIONER OF FISH AND FISHERIES. 



"Granules." — Biltsclili summarizes his results tlius: 



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 each 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 interj)reta- 

 tion mentioned as a mere conjecture. 



Effects. — Invades the connective tissue and ovules of Phoxinus phoxi- 

 nus (Th61ohan, 1892). 



Sahitat. — BranchiiB of various cyprinoids, particularly Lcuciscus 

 {Sqtialius) cephalus L.; Barhus harbus L. (barbel), both Jide Biitschli. 

 Fins of L. cephalns; kidney and ovary of Phoxinus phoxinus Jj., and on 

 Crenilahrus nielops at Eoscoff (Thelohan). 



47. Myxobolus? sp. incert. 



Psorosperm (second species) of Plali/stoma fasciatum Miiller, 1841, Miillera 

 Archiv., p. 489. 



Cyst and myxosporidium unknown. 

 Spore. — Oval, uutailed; size equals thatof ilf. sp. Gl. 

 Habitat. — On branchial arches (especially at their angles where the 

 mucous membrane is soft) of Pseudoplaty stoma fasciatum. 



48. Myxobolus bicostatus Gurley, 1893. PI. 19, fig. 1. 



(^Myxosporidian spore of Tinea vahjaris, Lieberklilm in Biitschli, 1882, Bronn's 



Thior-Reich, i, pi. 38, fig. 19.) 

 Myxoholus Ucostatm, Bull. U. S. Fish Com. for 1891, xi, p. 414; ih. Braun, 1894, 



Ceutralbl. f. Bakt. u. Parasitenkde, xv, p. 87. 



No description. 



Habitat. — Branchiae of Tinea tinea L. {=vulgaris)y tench. 



This species is distinguished from M. elUpsoides by its larger capsular 

 index (0-50 as against 0-33 in If. elUpsoides) and by the 2 oblique ribs 

 on the shell. 



