A400 KANSAS UNIVERSITY SCIENCE BULLETIN. 
DESCRIPTION. 
Melanoplus femur-rubrum. 
Spermatogonia. 
It was somewhat difficult to find clear spermatagonial plates, 
as the chromosomes crowd very closely at this phase, and the 
bent form of the rodlike chromosomes seldom lie in one plane. 
Their general arrangement is radial, one end of the rod point- 
ing toward the center of the cell. Figure 5 is an unusually 
fortunate cut, which shows the radial arrangement very well. 
Many of the chromosomes are in cross sections, though two 
or three pairs of small spherical ones occur rather constantly 
through the later generations. The chromosomes can be paired 
fairly accurately in such a view as figure 5. 
Going back to an earlier stage in the development of such a 
cell, we find the chromatin in the form of a slender spireme, 
radiating from a black mass lying close to the nuclear mem- 
brane. (Fig. 2, pl. 28.) This body is probably the accessory 
chromosome. The spireme is irregular, giving a beaded ap- 
pearance. I take figure 3 to represent the next stage. It lies 
in an adjoining cyst. The thread has thickened, segmented 
across, and shows a longitudinal split. At figure 4 is shown a 
still further condensation of chromatin. Chromosomes are 
now formed which look vacuolated, and one is distinctly sepa- 
rated from the others by a membrane. Such an isolation of 
the accessory is typical of Brachystola and other genera. The 
metaphase, viewed from the side of the spindle, looks some- 
what like a second spermatocyte, but here, of course, the 
chromosomes are more numerous and crowded, and the 
spindles smaller. An equatorial plate has been described at 
the beginning of this section. It shows twenty-three chromo- 
somes when all are present, and in many of the cells it is not 
difficult to identify the chromosomes of spermatognia and 
spermatocytes. 
Oédgonia and Female Somatic Cells. 
A study of developing o6gonia was made in the hope of 
getting clearer plates than in the male, but the cells are very 
small when division takes place. After division rapid growth 
occurs, in which the chromatin forms a fine spireme, much 
beaded in appearance. (Fig. 12.) The nucleus grows as 
well as the cytoplasm, the fine chromatin threads expanding 
