OVARY AND OVARIAN EGG OF ANOPHELES 447 
Fig. 3.—Commencement of branching. Nucleus still vacuolated. 
Fig. 4.—Later stage of branching, vacuoles have disappeared. 
Fig. 5.—Branching nucleus in half-developed follicle. 
Fig. 6.—Branching nucleus in full-sized oocyte, after extrusion of nurse- 
cells. 
Fig. 7.—Adult female genital organs. Ovaries in resting stage. 
Fig. 8.—Ovary containing full-sized oocytes. 
Fig. 9.—Egg after deposition. Anterior end at top of figure. A, Dorsai 
view. 8B. Lateral view. c. Median transverse section. 
Fig. 10.—Sporozoa from yolk-mass. 
Fig. 11.—Section of yolk-mass. 
Figs. 12-21.—Progressive stages of oocyte nucleus. 12-16 scale of 15. 
17-21 scale of 17. 
Fig. 12.— Bouquet stage ’. 
Fig. 13.—Spireme surrounding nucleolus. 
Fig. 14.—Nucleolus becoming free from spireme. 
Fig. 15.—Nucleolus becoming vacuolated. 
Fig. 16.—Spireme condensing. 
Fig. 17.—Resting stage. Spireme condensing to form chromatin residue. 
Fig. 18.—Commencement of second period of growth. Chromatin residue 
losing staining properties. 
Fig. 19.—Slightly later stage. Chromatin residue separating from 
nucleolus which has practically lost vacuolated structure. 
Fig. 20.—Portion of nuclear branch in half-developed follicle. 
Fig. 21.—Portion of nuclear branch containing globular masses at 
period when nurse-cells are breaking down. 
Fig. 22.—Transverse section of half-developed follicle, showing ring-like 
formation of branching nucleus. 
Fig. 23.—Longitudinal section of follicie at same stage, showing posi- 
tion of nuclear branches. 
Fig. 24.—Longitudinal section of secondary follicle and end chamber, 
Folded tunica propria left by degenerated primary follicle. 
Fig. 25.—Longitudinal section of secondary follicle. One nurse-cell 
nucleus contains spireme. 
Fig. 26.—Longitudinal section of follicle in resting stage. 
Fig. 27.—Longitudinal section of follicle at beginning of second period 
of growth, showing denser cytoplasm between nurse-cells and oocyte 
nucleus, commencement of inner wall and yolk production. 
Fig. 28.—Musculature of investing membrane. 
Fig. 29.—Muscles of investing membrane and follicular tube membrane, 
showing transition to circular and longitudinal muscles of oviduct. 
Fig. 30.—Nurse-cell nucleus in resting stage. Tangential section. 
Fig. 31.—Transverse section of end chamber containing mitotic figure. 
