136 J. J. LISTER. 



and few in number, or they may be so large and abundant that 

 the chambers containing them appear under a low power red with 

 the irregular deeply stained masses. In sections these strands 

 are frequently seen to be continuous with the nuclei (fig. 12). 



In some specimens (fig. 6, a and b) the nuclei furthest 

 removed from the centre present the rounded shape above 

 described, several of them being disposed in pairs as though 

 recently divided, but as the series of chambers is followed to- 

 ward the centre the nuclei assume an irregular shape, and the 

 red-stained strands appear in the protoplasm about them ; 

 gradually the nuclei become more and more irregular, until in 

 the innermost chambers no nucleus of the rounded form is seen, 

 but in their stead there are the irregular deeply stained strands. 

 In one large specimen, with forty-seven chambers, no rounded 

 nuclei are visible, and the whole of the stained matter appears 

 to consist of the irregular strands. 



It has been stated that the rounded nuclei have not been 

 observed in the terminal chambers, but this is not the case with 

 the strands. Though in the majority of cases these are most 

 abundant in the chambers in which the rounded nuclei lie, in 

 others they are found in the terminal chambers, and in one 

 specimen they are seen to be closely massed in the terminal 

 chamber. 



To repeat, the facts which the preparations show are these : — 



1. The irregular strands may be seen continuous with the 

 rounded nuclei. 



2. In a single specimen all transitions are found between 

 the rounded nuclei and the irregular strands. 



3. While in some specimens, and especially young ones, only 

 rounded nuclei are present and no strands, in others the re- 

 verse is the case, only strands being present and no nuclei. 



It appears probable that while in young specimens the 

 nuclear material is in the form of rounded bodies multiplying 

 by simple division, it is gradually dispersed through the proto- 

 plasm in the form of these irregular strands. 



[Since this was written I have examined specimens of the 



