CESTODES 



201 



T. solium L. The pork tapeworm (Fig. 328). Length about 3 m., 

 with about 900 segments; terminal segment about 12 mm. long and 



Fig. 327 — Twnia saginata (Leuckart). A, head with the anterior segments ; B, a 

 segment about a third of the distance back from the head ; C, terminal segment ; 

 D, a piece of beef containing three cysticerci ; P, common genital pore. Other refer- 

 ences as in Fig. 315. 



6 mm. wide, containing a uterus which has from 7 to 10 branches on 

 each side; scolex about 1 mm. thick with a rostellum bearing a double 

 row of about 28 hooks: in the human intestine; the cysti- 

 cercus {C. cellulosae) is from 6 to 20 mm. long and about 

 half as wide and thick and lives normally in the muscles of 

 the pig, but also lives readily in .man, being found in the 

 eye, brain, heart, and other organs and causing often in- 

 sanity or death; rare in this country. 



T. marginata Batsch. The large dog tapeworm. 

 Length up to 3 m. ; terminal segments 10 mm. long and 

 5 mm. wide, containing a uterus with from 4 to 8 branches 

 on each side ; rostellum with 2 rows of about 38 hooks : in 

 the dog; cysticercus {C. tenuicollis) in the viscera of pigs 

 and ruminants; not common in this country. 



T. serrata Goeze. The serrate dog -tapeworm. Length 

 up to 1 m. ; terminal segments 10 mm. long and 5 mm. wide, 

 containing a uterus with 8 to 12 branches on each side ; edge 

 of strobila serrated; rostellum with 2 rows of about 40 

 hooks: in the dog; cysticercus (C. pisiformis) about the 

 size of a small pea, in the peritoneum of rabbits and hares; 

 common. 



T. crassicollis Rudolphi. The cat tapeworm. Length 

 up to GO cm. ; tenninal segments 10 mm. long and 6 mm. wide, containing 

 a uterus with about 10 branches on each side; rostellum with 2 rows of 



Fig. 328 



Tffnia solium 



(Leuckart). 



A, head 

 B, terminal 



segment. 



