THE GREGARINES AND COCCIDIA 



345 



greatly in amount, forming the characteristic star-shaped figures that have so 

 often been depicted. According to Schellack and Reichenow, however, Jollos' 

 observations relate to Barroussia alpina, and not to Adelea ovata, and his state- 

 ments with regard to cytological details are criticized, and contradicted in 

 part, by these authors and also by Debaisieux. In Caryotroptia the nucleus 





FIG. 153. Schizogony of Adelea ovata. A C, Multiplication of a female schizont 

 to produce a cluster of merozoites (C) in which the nucleus has no karyosome ; 

 D F, multiplication of male schizont to produce a corfS en barillet (F) 

 of merozoites, in each of which the nucleus has a conspicuous karyosome 

 placed at one end of the nucleus. (According to Schellack and Reichenow, 

 however, the figures A C alone represent the schizogony of Adelea ovata, 

 and the figures D F represent that of a distinct species, Barroussia alpina.) 

 After Siedlecki. 



of the schizont resolves itself into a mass of chromidia, which is then constricted 

 simply into two masses, then again into two, and so on (Siedlecki, 653). 



Non-sexual multiplication has long been known to occur in Coccidia, but 

 the schizogonous generation was regarded formerly as a distinct genus and 



