PLATE 28. 
Melanoplus femur-rubrum. 
Fic. 1.—Resting spermatogonium. 
Fic. 2.—Spireme stage of spermatogonium, with loops of chromatin 
arising from homogeneous mass of chromatin at nuclean membrane. 
Fic. 3.—Further spireme stage, with tendency to longitudinal split. 
Fic. 4.—Vesicular stage in late prophase of spermatogonium. Here 
the accessory is separated from others. Chromosomes are sometimes 
vacuolated. - 
Fic. 5.—Spermatogonium, showing the full number of chromosomes 
in equatorial plate. 
Fic. 6.—Somatic cell from follicular epithelium, showing but twenty- 
two chromosomes. 
Fics. 7 to 11.—Spermatogonia, showing size and arrangement of 
chromosomes: Figs. 7 and 8, equatorial plates; 9, metaphase; 10, ana- 
phase; 11, telophase. 
Fies. 12, 13, 14.—Odgonia in early development: Figure 14, the fol- 
licular cells are forming around the young egg; the chromatin is loosely 
arranged in a ring. 
Fics. 15, 16.—Early resting phase of first spermatocyte. 
Figs. 17, 18.—Spireme stages in first spermatocyte. 
Fies. 19, 20-—Spireme has a distinctly beaded appearance. 
