382 SHANA D. KING AND J. BRONTE GATENBY 



to identify Siedlecki's stages of macro- and micro-schizonts. 

 We have no wish to enter into a purely protozoological field, 

 but later we shall have to come to some decision ; at present 

 we do not find any clear evidence for the macro- and. micro- 

 schizonts of Siedlecki, but wish to leave the matter open. 

 We feel sure, however, that the stages we definitely identify 

 in the present paper are schizonts and gametocytes. No 

 sporogony stages are described. 



Several special methods, which show the Golgi apparatus 

 of the metazoan cell, have been used by us. In our material 

 they demonstrated a hitherto undescribed structure in Adelea. 



Our reasons for identifying this intra-cellular structure as 

 the Golgi apparatus are as follows : 



1. Its staining and fixing reactions are identical with those 

 of the Golgi bodies of the metazoa. 



2. It occupies an excentric juxta-imclear position and spreads 

 out in the cell cytoplasm, as does the Golgi apparatus in many 

 metazoan cells, e. g. the egg, and the nerve-cell. 



3. It consists mostly of the very characteristically shaped 

 crescents and beads, known, in the case of the metazoan cell, 

 as dictyosomes. 



4. As in the metazoan cell, these protozoan dictyosomes can 

 be found dividing by themselves in the ground cytoplasm. 



An account of the details of our technique and of our reasons 

 for making the statement in paragraph 1 , above, will be given 

 in a later paper. 



Schizogony. 



The merozoite and sporozoite of certain ' Coccidia are said 

 to be much alike : small nuclear differences have been described : 

 in Eimeria schubergi the nucleus of the merozoite is 

 said to have a distinct karyosome, absent in that of the sporo- 

 zoite. On this ])asis the stage drawn in PI. 21, fig. 5, would be 

 a merozoite — it has a karyosome ; at the present stage we 

 prefer to call the latter a nucleolus (w). Such small crescentic 

 coccidians occur commonly in areas of the Lithobius gut, 

 where the asexual multiplication occurs. They are found 



