278 J. E. S. MOORE. 
4. The cytoplasm presents the usual fine reticulation in its 
substance (figs. 1, 11), and the nucleus is placed excentrically 
within its mass, so that there is more cell body on the one side 
than on the other. 
The whole reticulation of the cytoplasm is disposed radially 
towards a point just outside that part, of the nuclear wall which 
faces the larger mass of the cytoplasm (fig. 2, 7.), and the point 
itself is occupied by two small centrosomes (c.), which can be 
stained bright red by treatment with fuchsin and orange G. 
There is hardly any archoplasmic substance round the cen- 
trosomes, and they, together with their cytoplasmic radiation, 
which extends quite out to the periphery of the cell,’ constitute 
a good example of what I have elsewhere called? a simple 
sphere. 
There are one or two small chromatic bodies in the cyto- 
plasm (fig. 2, b. c.). 
Ill. The Divisions of the Cells of the First Spermato- 
genetic Period. 
5. Just as the successive generations of resting cells in the 
first spermatogenetic period are all alike, so also are the 
divisional metamorphoses by which they are produced. 
At the commencement of mitosis the nuclei become swollen, 
their smooth round contours appearing as if turgid with an 
excess of intra-nuclear sap (fig. 13), and at the same time the 
chromatic framework shortens up into a lesser number of 
stouter threads. But I have not seen any indication of early 
1 Dr. Heidenhain, in his paper published in the ‘Arch. fiir Mikr, Anat.,’ 
Bd. xliii, p. 496, 1894, is anxious to claim priority over me in the discovery of 
radii extending from the sphere in leucocytes to the periphery of the cell. The 
words I used in a former paper were these : “a delicate radiation spreads from 
the whole sphere to the periphery of the cell” (‘Quart. Journ. Mikr. Anat. 
Sci.,’ vol. xxxiv, p. 188); and my meaning would have been equally well ex- 
pressed had I used the word towards” instead of “to” the periphery. I have 
therefore no claim at all in the matter, and it seems to me to have about as 
much importance as the conclusions which Dr, Heidenhain has drawn from it. 
2 “On the Morphological Value of the Attraction-sphere,” ‘Science Pro- 
gress,’ vol. ii, No. 10. 
