PARASITES OF PROTOZOA 1045 



Greenway, 1926; Bacigalupo, 1927, 1928), £. coU (Cragg, 1919; Nol- 

 ler, 1921; Epstein, 1922; Lwoff, 1925; Bacigalupo, 1927, 1928), Endo- 

 Umax nana (Dobell, 1919; Noller, 1921; possibly Epstein, 1922; Green- 

 way, 1926; Wenyon, 1926; Bacigalupo, 1927, 1928), lodamoeba 

 hi'itschln (Noller, 1921; Wenrich, 1937), and Dientamoeha jragilh 

 (Noller, 1921; Wenrich, 1940). Lwoff (1925) thought that the parasite 

 of Entamoeba dysenteriae {histolytica) , E. coli, and Endolimax nana is 

 identical with Sphaerita endogena; but he provided the name 5". normeti 

 for use if it is proved to be a new species. 



The chytrid is equally prevalent in other endozoic amoebae. Leger 

 and Duboscq (1904) stated that an amoeba in Box hoops [E. salpae) 

 is often ravaged by microspheres which lead to its destruction. Wenyon 

 (1907) noted the parasites in Entamoeba muris as "vacuoles containing 

 cocci"; Kessel (1924) recorded Sphaerita from the same amoeba. Becker 

 (1926) described S. endamoehae from Entamoeba citelli, and the same 

 chytrid was found by Sassuchin, Popoff, Kudrjewzew, and Bogenko 

 (1930) in this amoeba of ground squirrels in Russia, though without 

 reference to Becker's account. A parasite of Hyalolimax cercopitheci was 

 named 5". parvula by Brumpt and Lavier ( 1935b) . Other records are from 

 Endamoeba simulans of termites (Kirby, 1927), Entamoeba bobaci of 

 Mannota bobaci (Yuan-Po, 1928), E. pitheci from Macacus rhesus 

 (Sassuchin et al., 1930), and Entamoeba sp. of cattle (Jirovec, 1933). 

 Third-degree parasitism is that of Sphaerita in entamoebae in Zelleriella, 

 reported by Stabler and Chen (1936). In almost all instances, in intes- 

 tinal amoebae, the parasites have been encountered only in the tropho- 

 zoites. 



Among endozoic ciliates, aside from Chen and Stabler's (1936) state- 

 ment that Sphaerita has been found in Zelleriella as well as in its 

 entamoeba parasites, the chytrid has been reported only in Nyctotherus 

 and Ophryoscolecidae. Sassuchin (1928a, 1934) found it to be common 

 in N. ovalis from. Periplaneta (Fig. 217C, D). In ciliates of antelopes, 

 Dogiel ( 1929) described Sphaerita diplodiniorum in Diplodinium costa- 

 tum and Ostracodinum gracile. Jirovec (1933) gave the name S. ento- 

 dinii minor to a chytrid in Entodinium simplex (?), and 5". entodinii 

 major to one in Entodinium longinucleatum. He observed also a Sphae- 

 rita-like parasite in an undetermined species of Entodinium, and stated 

 that in other Ophryoscolecidae none of these chytrids were observed. 



