220 REPORT OF THE COMMISSIONER OF FISH AND FISHERIES. 



"Granules." — Biitsclili siimmaiizcs liis results thus: 



There arc very constiintly found in the ])iot<)i)lasni 2, or sometimes more, strongly 

 refractile glittering granules of a roundish forui. Tliey are usually, though by no 

 means always, situated tolerably symmetrically, just at the posterior ends of th(! 

 polar capsules. No decided regularity obtains either as regards the number or 

 position of the granules, as they are sometimes placed farther forward betweeu the 

 capsules, and sometimes are strewn entirely irregularly through the plasma. 



I have also observed, with louger 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 iuterpreta- 

 tion mentioned as a mere conjecture. 



affects. — Invades the connective tissue and ovules of Phoxinns phoxi- 

 nns (TMlohnn, 1892). 



Habitat. — Branchiie of various cyprinoids, particularly Leuciscus 

 {SquaUus) cephalus L.; Barhns harhus h. (bAvhL']), both fide Biitschli. 

 Fins of L. cephalus; kidney and ov^ary of Plioxinus phoxinus L., and on 

 Crenilahrus melops atEoscoff (Th61oban). 



47. Myxobolus? sp. incert. 



Psorosperm (second species) of Platijsioma fasciatum Miiller, 1841, Miillor's 

 Archiv., p. 489. 



Cyst and myxosporidium unknown. 

 Spore. — Oval, untailed; size equals thatof ilf. sp. 01. 

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

 mucous membrane is soft) of Fseiuloplaty stoma fasciatum. 



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



(Myxosporidian spore of Tiiica vulgdr'ts, Lieberkiihn in Biitschli, 1882, Bronn's 



Thier-Reich, i, pi. 38, iig. 19.) 

 Myxobolus hicostatiis, Bull. U. S. Fish Com. for 1891, xi, p. 414; ib. Braun, 1894, 



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



No description. 



Habitat. — Branchiae of Tinea tinea L. {=vnlfjaris), tench. 



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

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

 on the shell. 



