258 RKPOIJT OF TH1-: COMMISSIONER OF FISH AND FISHERIES. 



except that the 2 tails are still short and distant from each other at their 

 origin. Besides they show an extreme transparency, their degree of 

 refringen<'y being- very inferior to that of the psorosperm, thus easily 

 escaping search in the midst of the very similarly refringeiitprotoplasm. 



Spore. — Characters constant; body lenticular; length, S to 10 y/; tail 

 not merely bifurcate, biit double from the base, this feature, however, 

 beiug only recogiii/ablein a portion of the prolile, as when the si»ore is 

 seen from tlie face one tail exactly cov^ers the other; capsules 2, ovoid. 



Hahitat. — Eu(;ysted in the nuiscles of Coref/onm /'era. 



Eem((rl-s. — Very probably this form should be ctjrrelated with the 

 preceding; but as Ivolesnikoff has given no nieasureuieuts and Clapa- 

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



83. Myxobolus? diplurus Guiley, 1893. PI. 3G, Tim. 1. 



(Psorospernis from ^^.illnt'y of Lotaruhfaris, Hiilstlili, 1S82, P.miHrs I'liiii-Reu!), 

 I, pi. 38, lig. 21; (,'^., Laiikcstor, 1885. Kucycl. l^ritaii., 'J cd., XTX, p. 85.5, 

 fig. xvir, 42.) 

 Myxoholus dlphini.'<, Hull. U. 8. Fish Com. lor 18!U. xi, p. 418; ib., Brauu, 

 1894, Cciitnilbl. f. Rakt. n. Parasiteiikde, xv, p. ST. 



No description. If IMltschli's figures are to be depended upou,this 

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

 posterior position of the capsules. 



Mabitaf. — Kidriey of Lota lota L. (ling). 



Fani. CllLOK'OMVNfD.E (^nrley, 1893. 



("Chloroinyxees," et " Myxidioes '" (ijar.s). i'lu'lolKUi, 1892, Bnll. Soc. pliilomat. 



Paris, rv, pp. 173, 17u; Chlorouiyxca [Tliol.J ISraiiu, 1893, Central))], f. 



Rakt. u. Parasiteulcd.-, xiv, p. ,739.) 

 Vhluromiixida', Bull. F. S. Fisli Com. for 1S91, xi, pp. 412, 418; ih., Hraun, 

 1894, Ceutralbl. f. Rakt. u. Parasiteiilcd.-. w , p. ST. 



Definition. — Fhamoeyfttcs destitute of antero-])osterior, but possess- 

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

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

 the longitudinal; ^ no vacuole; type genus Chloromyxinn. 



Vacuole. — Thelohan ' is authority for the statement that this 

 structure is absent from the sporoplasm of the CJdoromiixidw as here 

 constituted. My observations on G. (*S'.) ohlmacheri confirm this. 



Pifjiiicnt. — Leydig (see p. 200) notes in the myxosporidium of G. 

 lei/di(jii a yellowish coloration which he attributed to bile stainnig. 



Mingazziui^ also mentions this coloration, but does not comment upon 

 its origin. 



'Imperfect from unilateral position of sporoplasm in Ceratomi/xa. 



2 An examination of C. (S.) ohlmacheri has confirmed the opinion lia;carded in a 

 former paper (Bull. U. S. Fish Com. for 1891, xi, p. 412), that in the Cldoromyxidce 

 the valve-iunctiou plane is the vertical. 



'Bull. Soc. philomafe. Paris, 1892, iv, p. 173. 



* Roll. Soc. Nat. Napoli, 1890, iv, p. IGO. 



