i895-l 473 [General Meeting. 
iniu'i- as])OCt of tlio nucleus (turnoil toward tlio former position of 
the s}»indle). The entire mass thus assumes a horseslioe sliape in 
section, with the nucleus lying on its concave side. The mass 
finally divides upon tlie side opposite the sphidle, and the cell 
[)asses into the resting stage, thus giving rise at each pole of the 
nucleus to an archoplasm-mass sun-ounded by asti-al rays pre- 
cisely as in the " pause " after the fusion of the nuclei and the 
division of the sj^erm-aster. At this stage likewise the same color 
contrasts occur, the central mass being red and the rest blue. 
Pi-ofessor Wilson pointed out in some detail the bearings of 
these observations on those of other investigators, and upon the 
general question of the mechanism of inheritance. Admitting 
their accuracy, they would seem to afford a conclusive demonstra- 
tion that the archoplasm is not concerned in inheritance since it 
is derived from one sex only. These investigations thus remove 
some of the objections that have been urged against the nuclear 
theory of inheritance advocated by Hertwig, Strasl)urger, and 
others, and confirm the view of Boveri that the archoplasm is 
essentially a dynamic element of the cell concerned with cell- 
division. They indicate further in the author's opinion that 
neither the archoplasm nor the centrosome can in any proj^er 
sense be regarded as a necessary and constant element of the 
cell, or even as a definite morphological body. The archoplasm 
is to be regarded as a differentiation of the cell-sul)stance that 
under certain circumstances, it is true, may persist and ])e 
handed down by division from one cell to another, \mt under 
other circumstances may totally disappear from the cell. 
Gexkkal Meetixg, Marcii 0, 1895. 
Vice-President Samuel Wells in the chair. Thirty-fom- 
persons present. 
The following papers were read : — 
