GOLGI BODIES OF A COCCIDIAN 388 



among the cells of the gut, intra- and inter-cellnlar in position, 

 and often in the lumen. 



In such stages one can impregnate a ring-like structure, 

 just near the nucleus, in exactly the same position, and of the 

 same general appearance as the (lolgi bodies of many metazoan 

 cells. In PI. 21, fig. 2, is drawn freehand at a very high magni- 

 fication, a number of these structures we now identify as the 

 Golgi apparatus ; the latter consists, as in sponge, coelenterate, 

 and many other cells, of dictyosomes (or Golgi crescents and 

 bent rods) lying upon the surface of a thickened protoplasmic 

 zone or centrosphere. Whether or not a centrosome exists in 

 Adelea, there is certainly a darker (denser) zone associated 

 with the sickle-shaped dictyosomes. 



As the merozoite (sporozoite) grows and becomes definitely 

 a trophozoite, the Golgi apparatus develops into an important 

 part of the cell : in PI. 21, fig. 11, g, is the Golgi apparatus of 

 a growing coccidian ; the apparatus is seen to consist of a 

 number of bent rod-shaped structures, and it is produced by 

 the growth and fragmentation of the original Golgi fragment 

 of the younger cell ; the nucleolus, hither excentric, becomes 

 more centrally disposed in the nucleus. 



In PI. 21, figs. 12 and 13, the Golgi apparatus is seen to have 

 fragmented partly and the separate dictyosomes are irregularly 

 scattered, though a main aggregation is found at g, in a juxta- 

 nuclear position. 



Such cells proceed to division ; in PL 21, fig. 14, is a stage 

 with four nuclei (tw^o shown), and the Golgi bodies had been 

 gathered into four rough groups, one around each nucleus (n). 

 The Golgi bodies at this stage were spherical, crescentic, or 

 granular; the next stage is shown in PI. 21, figs. 16 and 17, 

 where each one of the many nuclei had near it, its own quota 

 of Golgi beads, crescents, and granules. In PI. 21, fig. 16, the 

 apparatus consisted of closely associated crescents, in fig. 17, 

 of much coarser rings and crescents. Such stages are followed 

 by ones showing the formation of cell- walls, and separation of 

 the merozoites and their subsequent scattering and growth again. 



There were from 20 to 30 nuclei in the last stages of division : 



