3 IQ 
out the bilobed cephalic gland (Fig. ioi), and further 
back the bulbous ends of the cheliceres with radiating 
muscular fibres. Around these is a chitinous ring 
formed by the fold at the base of the rostrum. 
The Ovary ,—Lying upon the diverticula in the 
posterior portion of the body, the ovary studded with 
developing ova (Fig. 103). 
Fig. 103. Reproductive organs of Ornithodoros 
Female : O — ovary ; Ov = oviduct; Sp = spermatheca ; 
G.O = genital orifice. Male: T = testis; V.D = 
vas deferens; W = white gland; P = penis ; 
G.O = genital orifice 
Note that there is a single ovarian sac opening at 
either end into an oviduct, and that the developing 
ova project from the outer wall of the sac and only 
pass into the cavity at maturation (Fig. 104). 
By aid of sections and fresh preparations observe 
that 
(a) Each ovum is attached to the ovary by a 
funicle, composed of a single tube of modified ovarian 
cells. When the cavity of the ovary is distended this 
tube is obliterated and the cells form a thick plate. 
