230 The Management and Diseases of the Dog. 



native dogs. I have elsewhere characterised the larva of 

 this parasite as the slender-necked hydatid {Field, Feb. 22, 

 1873). The accompanying illustration, from the learned 

 Pastor Goeze's work,- shows the hydatid {Cysticercus 

 tennuicollis) of the natural size at A, Fig. 28 ; whilst the 

 letter B represents a magnified view of the head, display- 

 ing the suckers and double crown of hooks." 



TJte Hydatid Tapeworm.—" Of all the entozoa infesting 

 mankind and animals, the little Tcznia enhinococcus is one 

 of the most remarkable. The larvae form the common 

 hydatids, or bladder worms, oi ^eX.Qxmzxi^.'os {Echinococcus 

 veterinorum'), 



" As in the dog the full-grown tapeworm only reaches 

 the third of an inch in length, it is difficult for the non- 

 professional man to realise the fact that the same entozoon 



FIG. 29. 

 HYDATID TAPEWORM AND ECHINOCOCCUS HEAD. (COBBOLD.) 



in its larval or vesicular state attains a size many thousand 

 times exceeding that of the parasite in its adult condition. 

 Harmless when full-grown, it is fearfully destructive to life 



