E MYXOSPORIDIA, OR PSOROSPERMS OF FISHES. 137 



Parasite of Syijnaihus, Pfeiffer, 1891, Die Protozoeu als Krankheitserreger, 

 2ed., p. Ill, Jigs. 46-49: 



From a perusal of the description and an examination of tlie figures 

 I can find no evidence of myxosporidian aftinities, and liave therefore 

 excluded this form. While this paper is i^assing through the press, I 

 have, however, observed, PfeiHer's paper,^ in which, in the portion 

 devoted to the Myxosporidia, he says: 



Of the Syngnathus from the North Sea, which the author was able to investigate 

 two years ago in Helder (Holhmd), the relative conditions have been thoroughly 

 pictured by the author in another place. 



Finally, a comparison with the following may perhaps not be inad- 

 visable : 



Csokor, Gregarlnosis d. Forellen, Oesterreich. Ztschr. f. wiss. Veteriuiirkde, Wien, 

 1888, II, pp. 56-58. 



The author says the forms observed were undoubtedly referable to 

 the "oviform and globular Coccidia (Gregarines)." From the general 

 tenor of his description I suspect they were not Myxosporidia, and in 

 any case there is at present no evidence to warrant their admission 

 into the subclass. 



Hardly any explanation of the table is necessary. The grouping and 

 position of the capsules (and the correlated orientation of the si)ore) 

 is made the leading character. ISText come the other generic characters 

 (bivalve condition of shell, i^resence or absence of vacuole, etc.). 



One of the most important uses of this table is to direct attention 

 to the gaps in our knowledge. Thus it will serve a useful purpose in 

 showing readily where work is most needed. 



> Centralbl. f. Bakt. u. Parasitenkdc, 1893, xiv, p. 124. 



