314 



THE ANATOMY OF CESTODES. 



sac (Fig. 163, c), 



Fig. 163. — Connection be- 

 tween the different parts of 

 the female generative appa- 

 ratus in Twnia canurus. 

 a, yolk passage ; b, oviduct ; 



c, vagina with receptaculum ; 



d, uterus ; e, fertilising canal. 

 ( X 50.) 



On its way to the 

 exit canal of the ovaries 



but is in more or less direct connection with the 

 uterus. As a rule, and perhaps always (especi- 

 ally in the case of the Cystotcenice), this union 

 is effected by means of a special tube which I 

 have named the " fertilising canal " (Befruch- 

 tungscanal).^ It originates from the posterior 

 end of the sperm sac — being indeed in some 

 measure a continuation of it and of the vagina 

 — and opens into the uterus after a short 

 course. Where the latter occupies the middle 

 line, it always opens at the posterior end, where 

 the " fertilising canal," especially in the Gysto- 

 tcenim, often assumes a curved course. At 

 the point of union with the uterus there is 

 found a small round body, consisting of 

 numerous unicellular glands, which from its 

 function I have named the " shell-gland." 

 shell-gland the fertilising canal receives the 

 of which two are always present in the 



'"Fig. 164. — Sexual organs of Tcenia echino- 

 coccus (penis during copulation). ( x 100.) 



Fig. 165. — Sexual organs of Tcenia, 

 coenurus, ( x 10.) 



Tseniadas. In the majority of cases these have the appearance of 

 two wing-like or hand-shaped organs, which are situated about the 



' I may take this opportunity of mentioning that I was the first to observe the con- 

 nection between the diflerentmaitt ofjthfifamalfi,af»^ The description given 



