PHYLUM PLATYHELMINTHES 



169 



by way of the vagina. There are numerous yolk glands joining each 

 oviduct along its length ; a glandular structure of questionable func- 



— Auricle 



CerebraL 

 (jancjlion 



LorKjitudinaL 

 nerve cord 



Testis / 



Vasa 



efferenbia 



Lateral 



nerve 



Vos l_( 



deferens 



Mouth \_^^ 



lumen of 



pharynx 



Seminal 



vesicle 



5eminal 



receptacle 



Intestine 



K-/rax^ Oviduct 



•H : -— ^ / Pharyngeal 



chamber 



Penis 



Genital pore 



Fig. 84. — Reproductive system of the planarian worm. Male organs shown on one 



side only. 



tion, in the form of a blind tube with an inflated end, is connected 

 with the genital atrium. It has been suggested that the fertilized 

 eggs accumulate and are retained here for a time. The system is 



