386 SHANA D. KING AND J, BRONTE GATENBY 



takes no part in the formation of the yolky bodies which are 

 to be found in I^oth trophizoites and gametocyte. 



In the asexual multiphcation phase where cell-division takes 

 place, the Golgi apparatus behaves as is usual in metazoan 

 cells : it becomes sorted out into subequal groups around 

 each dividing nucleus, and each ultimate daughter nucleus 

 has gathered near it a part of the original apparatus. We 

 have therefore established that a true dictyokinesis takes 

 place in the protozoan Adelea. 



The Golgi apparatus is found in every schizont and merozoite 

 we have examined, and strangely enough it always lies oriented 

 in a special manner with reference to the excentric nucleolus 

 (karyosome) of the oval nucleus : the Golgi bodies lie always 

 away from the nucleolus. The exact significance of this we do 

 not know' : it means possibly that this nucleolus does not 

 contain the body which during division is responsible for 

 shepherding the Golgi elements into groups around the syn- 

 cytial nuclei (PI. 21, figs. 16, 17). Whether a true centrosome, 

 either intra- or extra-nuclear is present, we are unable to say : 

 previous workers are mainly against the view that an extra- 

 nuclear centrosome occurs in Adelea. Suffice to say at present 

 that within, or near, the coccidian nucleus is some body with 

 the power of attracting the dictyosomes, as occurs in the case 

 of the metazoan centrosome. 



The interesting period of conjugation of the gametocytes 

 and of fertilization provided us with no facts worth recording 

 at length. We found not a jot or tittle of evidence for the view 

 that the Golgi apparatus of the male takes part in the process 

 of fertilization ; this period is undoubtedly the most difficult 

 to study, and we are not at present satisfied with our material 

 of these stages. 



So far as the senior writer is concerned, this examination of 

 the Golgi bodies of a coccidian has been disappointing from 

 the point of view of the phylogenetic origin of the Golgi 

 apparatus : we have found a typically metazoan Golgi 

 apparatus, which acts just like that in the metazoan egg, during 

 oogenesis, and which, as in most cases of metazoan fertilization, 



