266 REPORT OF THE COMMlS-IONHR OF FISH AND FISHERIES. 



88. Chloiomyicum (Spheerospora) ele§5'ans Tliololi.-ni, 1S92. I'l. 10, tig. 1. 



(Myxosporidian s])ore8 of (iastcrostciix ncitlcalus iMid H. jj(/*);/(h';(s (i/arx), Th61o- 



hiui, 1890, Annul, do jMLcrogr., il, pp. 193, 200, 20.% 209. ])1. 1, iig. 1.) 

 Spharospora elegaun, Bull. Soc. iiliiloniat. Paris, iv, i)p. 167, 175. 

 Cliloromyxum eleijam, Gurley, 1893, Bull. U. S. Fish Com. for 1891, xi, p. 419. 

 Sphwrospora elegauH, Braun, 1893, CentralM. IJakt. u. Par.-isitenkde, xiv, ]>. 739. 

 (Itloroini/xum eletjans, Brauu, 1894, Centralbl. Bakt. u. I'arasitenkde, xv, p. 87. 



Si/ no III/ my. — In 1S90 Th61olian described the jn-eseut species and M. 

 mediufi n.s spores occurrinj^^ in the renal tubules of G. acuJeatns and 1*. 

 pun(/itius. He remarked that the 2 entirely different forms of spore are 

 found in close association, occurrinf^ not only in the same kidney, but 

 side by side in tlie siuno tube of the kidney. Their relation to each other 

 could not be determined, as he was unable to trace them back to the 

 myxosporidium. 



M. Thelohan writes me (1803) that: 



lu puttinj:; uii interro^^ation point iu regard to the presence of Spharospora elegaiis 

 iu the kidney of Lota lota, I had in mind Balbiani's tig. 41. The spores which th;it 

 tigure represents are indeed a little less regularly spherical than those of Spha-ro- 

 spora and present a more pronouncedly attenuated extremity. Not having observed 

 Myxosporidia in the Lotas that I have been able to examine, I do not know whether 

 these fish contain exactly the same .■species as G. aculentus. The figures of Lieberkiihn 

 (Miiller's Archiv., 1851, pi. 11, figs. 5, 6) certainly do not belong to Spharosjyora. 

 They, in fact, present 4 polar capsules, and are rather near Chloromi/xitm fluviatUe. 

 Still they form, I believe, a distinct species. 



A close study of these lii^ures has led me to doubt seriously whether 

 Balbiani's fig. 41 can be correlated with Ghloromyxum (SpJucrospora) 

 eJegans. The whole question hinges upon the number of capsules in 

 Balbiani's spore. The close similarity between his figure and Lieber- 

 kiihn's fig. G, the fact that quadricapsulate forms have frequently 

 been figured by the authors as bicapsulate, and finally the close 

 approximation iu habitat (kidney and urinary bladder of same fish '), 

 all point toward the synonymy given above. 



Cyst none; myxosporidium unknown. 



Snore. — liound, nearly spherical, uutailed, 8 to 10 /i (Tlielohan, 1892; 

 9 to 12 //, t&i(7., 1890). Ridge present, terminating in a slight projection 

 at each end of the spore. 



Habitat. — Almost constantly present in the renal tubules of Gasteros- 

 teus aeuJeatus (stickleback) and those of Fygosteus pungitius (9-spined 

 stickleback) ; ? also in kidney of Lot'i Iota ~ (ling) : " accidentally" in-es- 

 ent in kidney of Phoxinus phoxinu.s L., ovary of G. aculeatus and that of 

 P. pungitius (all JideTh6lo\iSin; the last two in a letter to the author, 

 1893). 



IJffects.—Hee p. 248. 



'Balbiani does not give the seat. Thelohan cites it as the kidney {fide specimens 

 in Coll(^ge de France?). 



•The form habitant here I have referred to Chloro7nyxum mvcronaium (sec that 

 Bpecies, and the paragraph above in this one). 



