CHYTRIDIALES 125 



A Nucleophaga sp. has also been reported by Scherffel (1902a) in 

 Zygnema. Numerous records occur in the extensive protozoological 

 literature (see Sassuchin, 1934; Brumpt and Lavier, 1935). 



Doflein (1907) has described motile bodies in a parasite of Amoeba 

 which conjugate to form biflagellate zygotes. There is no real evi- 

 dence that they belong to Dangeard's fungus, particularly since the 

 flagellum is said to be anterior. 



SPHAER1TA Dangeard 



Bull. Soc. Bot. France, 33: 241. 1886; Ann. Sci. Nat. Bot., 



VII, 4: 277. 1886 



(Fig. 12 B-C, p. 124) 



Thallus parasitic in the cytoplasm of Rhizopoda and Euglenophy- 

 ceae, endobiotic, holocarpic, walled, without specialized vegetative 

 structures, forming the rudiment of the sporangium; sporangium in- 

 operculate, spherical, ellipsoidal or fusiform, usually liberated from 

 the host at maturity, discharging its zoospores by a splitting of the 

 wall or by the formation of a discharge papilla; zoospores uniflagellate, 

 the flagellum anteriorly attached but directed posteriorly; resting spores 

 not known with certainty. 



Species of Sphaerita are all parasitic in the cytoplasm of the host, 

 on which they may often exert little effect, at least until the sporulation 

 of the parasite, when death may ensue. 



Dangeard (1933) indicated that in view of the fact that Sphaerita 

 dangeardii, a species parasitic in Euglena, has been more adequately 

 studied than his S. endogena, he would designate it, if this did not vio- 

 late the rules of nomenclature, as the type of the genus. He felt that 

 further investigations of S. endogena, in Rhizopoda, might indicate 

 that it should be segregated in a genus of its own. It might be pointed 

 out that under Article 66 of the International Code for Botanical 

 Nomenclature the specific name endogena should be discarded as a 

 nomen confusum. 



subapical attachment of flagellum and anterior refractive granules. K. Plas- 



mophagus oedogoniorum de Wildeman, discharging sporangium in Tribonema. 



{A, Dangeard, 1894-95b; B-C, Dangeard, 1889b; D, F-G, Sparrow, 1936a; 



E, Zopf, 1884; H-I, Cornu, 1872a; /, Scherffel, 1926b; K, Sparrow, 1933c) 



