258 RKP(Mv'T OK rilK COMML^RIONER OF FISH AND FISHERIES. 



except that the 2 tails arc still short auddistaut from each other at their 

 orio-iii, licsidcs tliey sliow an extreme traiisi)ai'euey, their degree of 

 icfriiioeiicy being- very intV'iior 1o that of the i»sorosperm, thns easily 

 escaping- search in the midst of the very similarly retiingentpiotojilasm. 



Spore. — (Jharacters constant; body lenlienlar; length, S to 10//; tail 

 not merely Itifurcate, but donble from the base, this featuie, however, 

 being only recognizable in a portion of thcprolile, as when the spore is 

 seen from the face one tail exactly covers the otliei-; capsnles 2, ovoid. 



Hahitat. — Encysted in the muscles of Coregonus /era. 



Remarks. — Very probably this form should l)e correlated with the 

 preceding; but as Kolesnikoft" has given no measurements and i'lapa- 

 rede no figures, it is thought advisable to retrain from fusing them. 



83. Myxobolus? dipluius Gurloy, 1893. PL 30, lig. 4. 



(Psorosperui-s from kUhn^j of Lola vulgaris, Biitselili, ].><ii2, Jjioiui's Thii-r-Keii'li; 



I, pi. 38, fig. 21; ih., Lankcster, 1885, Kucycl. Britiui., 9 ed., xix, p. 855, 



fig. xvii, 42.) 

 Myxobolus dijylurus, Bull. U. 8. Fisli Com. for 1891. xi, p. 418; ib., lUauu, 



1894. C<Mitri\lbl. f. l^akt. n. Pavasiteiikde, xv, p. 87. 



Xo description. If l>iitschli's figures are to be de[)en(led upon, this 

 species is at once distinguished from all others of the genus by the 

 posterior position of the capsules. 



Hahitat. — Kidney of Lota lota L. (ling). 



Fam. CHLOROMYXID.F. Gurley. 1893. 



("Cbloromyxocs," et ''Myxidiees '' (pars), Thclohan, 1892, Bull. Soc. pliilomat, 

 Paris, IV, pp. 173, 176; Chloromyxca [Thel.] Brauii, 1893, Contralbl. f. 

 Bakt. u. Parasiteukde, xiv, p. 739.) 



Chloromijxida', Bnl\. U. S. Fish Com. for 1891, xi, pp. 412,418; ib., P.rann, 

 1894, Ceiitralbl. f. Bakt. u. Parasiteukdo, xv, p. S7. 



Definition. — Phamocystes destitute of antero-posterior, but possess- 

 ing bilateral symmetry; ' capsules in 1 group at the anterior end; a 

 bivalve shell, the plane ofjunction of whose valves is perpendicular to 

 the longitudinal; '^ no vacuole; type genus Chloromyxum. 



Vacuole. — Thelohan^ is authority for the statement tliat this 

 structure is absent from the sporoplasm of tl»e Chloromyxida' as here 

 constituted. My observations on C. {S.) ohlmacheri confirm this. 



Pigment. — Leydig (see p. 260) notes in the myxosporidium of C. 

 lei/digii a yellowish coloration which he atti'ibuted to bile-staining. 



Mingazzini ' also mentions this coloration, but does not comment upon 

 its origin. 



1 Imperfect from unilateral position of sporoplasm in Ceratomyxa. 



• kn examination of C. (S.) ohlmacheri has confirmed the opinion hazarded in a 

 former paper (Bull. XT. S. Fish Cora, for 1891, xi, p. 412), that in the ChloromyxidcB 

 the valve-junction plane is the vertical. 



^Bull. Sop. philouiat. I'aris, 1892, iv, p. 173. 



< Boll. Soc. Nat. Napoli, 18i)0, iv, p. 160. 



