I06 EISEN. [Vol. XVII. 



Fig. 39. Auxocyte in bretzel stage. The nuclear membrane is mostly dis- 

 solved. The spindle is viewed from one of its poles, showing the mantle fibers to 

 emanate from the outer margin of the centrosphere. The granosphere is partly 

 used up, and the plasmosphere is mostly scattered in the cytoplasm. There are 

 numerous accessory archosomes, some of which are connected by filaments of 

 somosphere. A row of accessory archosomes is seen around the granosphere, ' 

 all connected by a filament of somosphere. Many of the chromosomes show 

 darkly stained chromioles. Outside of the plasmosphere the cytoplasm is fibrous, 

 the fibers consisting of closely packed granules. 



Fig. 40. Auxocyte in bretzel stage. The chromosomes are rather heavy and 

 contracted. The spindle is seen from one of the poles, and is in the figure not 

 clearly definable. The granosphere is being used up by the spindle fibers. Much 

 of the plasmosphere is being scattered ; some of it is seen far down to the right 

 outside of the nucleus. The darker stained granules in the cytoplasm are the 

 remains of the metaplasmic secretions of the plasmosphere. There are several 

 accessory archosomes stained more or less deeply, some of them connected by a 

 thread of somosphere. The linin network is scattered. 



Fig. 41. Auxocyte in bretzel stage. Several of the chromosomes are halved 

 by the knife. The central spindle is well advanced. A set of contractile fibers 

 has formed from both archosomes, but has not yet reached the chromosomes. 

 A large accessory archosome at the upper end of the central spindle below the 

 granosphere is situated in a much deeper plane than the archosome and is not in 

 a direct line between the archosome and the granosphere. The plasmosphere is 

 scattered in the cytoplasm. The part of the nuclear membrane nearest the man- 

 tle fibers is dissolved. 



Fig. 42. Auxocyte in bretzel stage. This figure, together with the previous 

 one and several following, is arranged according to the development of the 

 central spindle. The chromosomes in all these figures are in about the same 

 stage of development. In the present figure the spindle is upright ; its axis con- 

 nects with the axis of the cell. The granosphere has hardly begun to dissolve, 

 its concave side is upwards. In the upper archosome are two centrioles, in the 

 lower one is only one centriole. The contractile fibers are not deeply stained and 

 are thus less well definable. Eight accessory archosomes, each with a centro- 

 sphere and with from one to three centrioles. The plasmosphere is scattered, the 

 remains are seen in two isolated groups at the left margin of the nucleus. The 

 nuclear wall nearest the spindle is dissolving. 



Fig. 43. Auxocyte in bretzel stage. This is an abnormal cell as regards the 

 position of the granosphere and the central spindle, the granosphere being gen- 

 erally so situated as to be equidistant from both the poles of the spindle. At the 

 upper margin are seen remains of the plasmosphere. An accessory archosome at 

 the periphery of the granosphere. The contractile fibers are well differentiated, 

 especially around the left pole of the central spindle. The nuclear membrane is 

 dissolved nearest the central spindle. 



Fig. 44. Auxocyte in bretzel stage. The nuclear membrane is less dissolved than 

 in the last figure. The granosphere is being used up. The contractile fibers are 

 well differentiated and deeply stained ; none of them has as yet reached the chromo- 

 somes. An accessory centrosome at the edge of the granosphere. The mantle fibers 

 possess several denser nodes. The linin network has entirely separated from the 

 chromosomes. The contractile fibers show a strongly granulated cytoplasm. 



