74 THE INTERNAL PAEASITES OF 



sumers, it may be confidently added, that all such blad- 

 dery " conies/'' whether much or little cooked, are quite 

 incapable of giving rise to parasitism in those persons 

 who partake of them. 



Eespecting certain other larval tapeworms which infest 

 sheep, all I need say is, that we find the " common 

 hydatid " and also the " slender-necked hydatid " rather 

 more abundantly in ovine than in bovine bearers. The 

 facts of their development will more naturally come 

 under my record of the canine entozoa; but a few 

 words must be said in reference to a recently- discovered 

 entozoon, which I have elsewhere -termed the Mutton 

 Measle. 



This larval tapeworm (Gysticercus ovis) resembles that 

 found in pork, inasmuch as its head is armed with a 

 double crown of hooks. On two or more occasions I 

 have detected degenerated measles in joints of mutton 

 brought to table, and Dr. Kirk appears to have observed 

 similar cysts in Africa ; whilst Professor Heisch gave me 

 the loan of a nearly perfect specimen which he had him- 

 self procured from the interior of a mutton chop. The 

 last-named example was some time ago figured in the 

 supplement to my larger treatise on entozoa, and I have 

 since attempted, by experiment, to ascertain the form of 

 the adult tapeworm representative of this new and 

 little-known larval parasite. At present my efforts in 

 this relation have only been attended with negative 

 results ; but I feel quite satisfied that the Gysticercus ovis 

 is specifically distinct, not merely from the corresponding 

 unarmed measle of cattle, but also from the armed cysti- 

 cercus of the pig. 



I see it stated (in Nature, for May 15, 1873, p. 59) 

 that Dr. Maddox has also found an encysted parasite in 



