214 REPORT OP THE COMMISSIONER OF FISH AND FISHERIES. 

 Eelative to its gcueric relations Perugia says: 



This form might be referred to the genus Myxohobts, i'rom which it seems to mo 

 to dilVer only by :i litlle. The diflereut hosts and the form of the spores only uiight 

 cause it to be regarded as a distinct species. 



40 Myxobolus sp. incert. PI. 14, fig. 7. 



(Pso#Dspcrm of jVais proboscidca, Lioberkiihn in Blitschli, 1882, Bronn's Thier- 

 Reich, I, p. 590, pi. 38, fig. 23; ih., Th<51ohan, 1890, Annal. deMicrogr., ii, p. 

 193; ib. Pfeiifcr, 1890, Virchow's Archiv. f. pathol. Anat. n. Physiol., cxxil, 

 p. 557; ib. Brauu, 1893, Centralbl. f. Bakt. u. Parasitonkde, xiv, p. 739.) 



No description. Its symmetry sliows it to be a Mtjxoholua. Observed 

 by Lieberkiilin, and communicated by him to Biitschli; published only 

 by the latter.^ 



Uahltat. — Ifais proboscidea (a worm)' 



41 Myxobohis sp. incert. PI. 15, figs. 1-G. 



Psorosperms of Fsox hiciiii; Liehcrkiihn, 1855, M<<m. Conr. et Mi^m. Sav. Strang. 

 Acad. Roy. Belg., xxvi, p. 37, pi. 10, figs. 10-12, pi. 11, figs. 1-1; ? ib. Butschli 

 1882, Bronn's Thier-Reich, i, pi. 38, fig. 11. 



Ct/st.— Size 8 mm. (0-31 inch) by 4-25 mm. (v')-17 inch) ; contents "granu- 

 lar matter" alone, spores alone, or both '• granular matter" and spores, 

 in variable proportion. 



Myxosporidium unknown. 



Spore. — Oval or circular, tailed or untailed; the 2 kinds often mixed 

 without order in the same cyst. 



Uahltat. — Cysts of branchife of Lucius lucius L. (pike). 



It is hard to know what to do Avith this form. In spite of his asser- 

 tion that tailed and untailed forms occur in the same cyst, Lieberkiilin 

 appears to figure only untailed forms. In view of this, and provision- 

 ally until some other observer shall confirm this observation, I prefer 

 to recognize this as a "form" distinct from the tailed one having 

 approximately the same habitat. (See also p. 256.) 



42 Myxobolus oviformis Thdlohan, 1892. PI. 14, fig. 8. 



( "Mysosporidian spore ( M. miilleri Buischli'?)" o? Cijjyrinits carpio and of 



Gobiofliiviatilis,-^ Thdlohan, 1890, Annal. de IMicrogr., ii, pp. 200, 204, 209, 



210,211,213, pi. 1, figs. 8-11; spore of C. carjno, Thelohan, 1890, Compt. 



Rend. Acad. Sci. Paris, Cix, p. 921). 

 MyxoboJus oviformis Tlidlohan, Bull. Soc. philomat. Paris, i v, p. 177 ; ib., Gurley, 



1893, Bull. U. S. Fish Com. for 1891, xi, p. 414; ?&., Brauu, 1893, Centralbl. 



f. Bakt. u. Parasitenkde, xiv, j). 739; ib., Braun, 1894, Centralbl. f. Bakt. u. 



Parasitonkde, xv, p. 87. 



Cyst and myxosporidium not mentioned. 



Spore. — Flattened-ovoid, with notably attenuate anterior extremity; 

 length, 10 to 12 //; breadth, 8//; cai)sules relatively large (G//); nuclei 

 ad x^lu^; ^', vacuole, present. 



' Brairn's language is slightly ambiguous: "Eine iiltere Notiz, von Lieberkiihn, 

 erwiihnt" the occurrence of Myxosporidia in invertebrates. 



■^An ambiguous expression of Lieberkiihn's (Bull. Acad. Roy. Belg., 18^, xxi,pt. 

 2, pp. 22-23) may refer to an observation of a species upon the branch ise of this fish. 



