T^NIA 



85 



The branches running into these canals end in a common orifice. Each 

 link or segment has an independent male and female sexual appa- 

 ratus. The male apparatus consists of numerous pear- 

 shaped testicular bladders with a canal of exit. The 

 end can be turned up into the female opening. In the 

 female portion we find ovaries, uterus and vagina. The 

 uterus is remarkably well defined in each segment (see 

 Fig. 41). 



The following varieties are seen in the dog: 

 Taenia Serrata (Fig. 42). — This variety is from 0.5 

 to 6 m. in length and about 0.6 cm. in width when fully 

 developed. The head is large, proportionately, bullet- 

 shaped, often four-sided, and is fitted with about 40 

 hooks in two rows and also sucking disks, wdiich are oval of the Tania coen- 

 in shape. The first sections after the head are very nar- ^^^^ Cenarge 

 row, and the middle sections are almost four-sided. The anterior bor- 



Fig 



Uterus 



Fig. 42. — Tienia Serrata. 



der of the segments is much narrower than the posterior. The edges 

 are serrated or saw-like, hence the name. The genital orifice is situated 



