226 



ANIMAL PARASITES AND MESSMATES. 



food certain mosses, sorrel, cochlearia, dandelion, &c., 

 from the midst of the plains in which live flocks of sheep 

 guarded by dogs. The eggs are scattered everywhere on 

 plants or in the water. 



Leuckart has made some very interesting experiments 

 on the echinococci. In Fig. 57 is shown a taenia which 

 proceeds from an echinococcns. 



Fig. 55. -Isolated scolex of the Tcunia echinococcns 

 from the pig. 



Fig. 56. — Tcenia echinococcus, from the pig. 



Fig. 67.- -Tcenia echino- 

 coccus, from the dog. 



There is yet another tape -worm harboured by man, 

 the Tsenia lata, better known under the name of Bothrio- 



