THE MYXOSPORIDIA, OR PSOROSPERMS OF FISHES. 



283 



Fam. MYXIDIIDyE Gnrley, 1893. 



("Myxidioes" (pars) Tholohan, 1892, Bull. Soc. philomat. Paris, iv, pp. 173, 175) ; 

 Myxidiido', Bull. U. S. Fish Com. for 1891, xi, pp. 412, 420; Myxidiea [Thol.] 

 Braun, 1893, Ceutralbl. f. Bakt. n. Par.asitenkdo, xiv, p. 739; Mi/xidiidw, 

 Brann, 1894, Ceutralbl. f. Bakt. u. Parasitoiikde, xv, p. 87. 



Definition (provisional as regards negative cliaracters). — Fhcenocystes 

 destitute of aiitero-posterior, but possessing bilateral symmetry; cap- 

 sules in 2 groups in the (right and left) wings; no bivalve shell; no 

 vacuole; type (and only) genus Myxidium. 



IX. MYXIDIUM Biitschli, 1882. 

 Etymology not given. 



Bronn's Thier-Reich, i, pi. 38; ih., Lankester, 1885, Encycl. Britan., 9 ed., xix, 

 p. 855 ; i6.,Th(^lolian, 1892, Bull. Soc. philomat. Paris, iv, p. 175; 77).,AVeltner, 

 1892, Sitzgsber. Ges. Naturf. Freunde Berlin, p. 351; il)., Terrier, 1893, 

 Traitode Zool.,p.460. 



Definition. — Characters those of the family; type, M. lidherMlJmii. 

 100. Myxidium lieberkiihnii Biitschli, 1882. Pis. 43-46; pi. 47, figs. 1-5. 



' Of air bladder ; error. 



