I04 EISEN. [Vol. XVII. 



chromatic granules. The linin is stained red, the chromioles are blue, but the 

 chromoplasm is not differentiated. Congo-thionin-ruthenium red. 



Fig. 26^. Part of the linin network, from an auxocyte in the bretzel stage. 

 The linin network is disarranged and has separated from the chromosomes. The 

 small brown granules are the linin granula ; the darker granules, of which there 

 are comparatively few, are paralinin granules of unknown nature. The granules 

 are connected by threads of the same apparent nature as the granules, and which 

 may be considered as projections from the granules. 



Fig. 27. Auxocyte, in the bouquet stage ; detail of the plasmosphere with two 

 large accessory archosomes, each of which consists of a slightly amoeboid centro- 

 sphere, a somosphere, and several interior centrioles of unequal size. The acces- 

 sory archosomes are connected by a thin ring of somosphere, on which are also 

 suspended granules of either archosomic or paraplastic nature. 



Fig. 28. Auxocyte in the irregular bretzel stage. Detail of the cytoplasmic 

 end of the cell, showing the two spheres with accessory archosomes. The inner 

 part of the granosphere has been drawn out by an archosome, the outer concave 

 shell of the sphere being viewed sideways. 



Fig. 29. Auxocyte in the perfect bouquet stage. Detail showing the two 

 spheres and part of the surrounding cytoplasm. The granosphere is cup-shaped, 

 and differentiated into two parts, the outer one of which is in the form of a deeper 

 stained ring, at the edge of which is seen an archosome with a faintly differen- 

 tiated centrosphere. The somosphere and centrioles are not differentiated from 

 each other ; the plasmosphere is well defined from the cytoplasm proper. The 

 alveoles of the granosphere are seen to be surrounded by the individual granules 

 of the spheres. 



Fig. 30. Auxocyte in the perfect bouquet stage. Detail of the spheres and of 

 the free ends of some of the spireme segments, the chromomeres not yet being 

 split. The chromomeres and the chromioles are slightly exaggerated as regards 

 size, but other details are in exact proportion. The granosphere and the plasmo- 

 sphere are both plainly alveolated, each alveole being surrounded by a single row 

 of granules. An archosome with two centrioles in the granosphere. Three 

 accessory archosomes in the plasmosphere. Three rows of alveoles in the 

 plasmosphere. 



Fig. 31. Auxocyte in the bouquet stage. Detail of the two spheres. The 

 granosphere is cup-shaped, consisting of one row of alveoles. The plasmosphere 

 is less regular, with one or two rows of alveoles. At least five accessory archo- 

 somes connected by rings of somosphere. On these rings are also suspended 

 among the centrosomes paraplastic granules of undetermined nature. 



Fig. 32. Auxocytes in the bouquet stage. Detail figures of three adjoining 

 cells. Two spindle bridges connect the three cells in the vicinity of the spheres. 

 The spheres are not fully reconstituted, showing the chromosomic evolution 

 to be more advanced than the radiosomic one. The accessory archosomes are 

 connected by rings. The dark red spheres are the granospheres. The archo- 

 somes are seen at the points where the spindle bridges join the spheres. Some 

 of the accessory archosomes have the same structure as the archosomes. 



Fig. ^iZ- Auxocyte in the bouquet stage ; detail of the sphere not yet fully re- 

 constituted. The archosome is connected with an accessory archosome by a fine 

 somospheric filament very sharply defined ; four centrioles in the upper somo- 

 sphere and at least two in the lower one. The latter centrosome is probably the 



