294: On some Parasitio Worms from East Africa. 



vao-ina (fig. 9, vag.^ opens into the cloaca beliind tlie cirriis- 

 sac, in tlie same lion'zontal plane. It has a wide liuneii for 

 the greater part of its length, the distal jiortion ]n-obal)ly 

 serving as a receptaculum seniiiiis. Just before reaching the 

 fen)ale glands it suddenly becomes narrow. Tlie vas deferens 



Fi-. 9. 



ov. 



I 



Ovcliortstira crassiceps. Semidiagrammatic view of tlie arrangement of 

 the genital organs in three consecutive mature segments (from 

 a whole preparation). 



c/., genital cloaca ; c.s., cirrus-sac : ov., ovary ; t., testes ; i-ay., vagina ; 

 v.d., vas deferens ; vit., yolk-gland. 



(fio-. 9, v.d.') is considerably coiled. There is no specialized 

 seminal vesicle. 



The general arrangement of the female organs is similar 

 to that found in other species. The ovary (tig._ 9, ov.) is 

 the most anterior organ, and lies iu the median field of the 



