Chapter XXIX. 



PARASITIC DISEASES 

 (COlsTTIlTXrEID). 



The Tape-Worm — Its Existence, in the Intestines — ,The Mange, or Itch — 

 Various Species of Acari — The Dog-Tick — The Fodder- Louse — The 

 Body-Louse — The Head-Louse — The Sheep-Louse — The Sheep-Tick" — 

 The Sheep-Bug — Man-Eating Ply — Tsetse Fly. 



THE TAPE- WORM.— In Figs. 1216 arid 1217 the more advanced 

 stage of the many-headed tape-worm is shown, called by Van 

 Beneden the strobile, or the strobiline condition. The de- 

 tached part in Fig. 1216 

 represents the scolex, 

 or head, greatly , en- 

 larged and invaginated. 

 The worm in this stage v 

 is capable of reproducing 

 itself without the gen- 

 erative process, but by 

 a species of budding or 

 generation. 



In Fig. 1218 is shown 

 the tape-worm as it ap- 

 pears in the peritoneum 

 of the sheep. 



TaPe-Worm in The 

 Intestines (Taenia 

 Plicata). —Although it 

 has been stated that the 

 intestinal sheep-worm is 

 Unknown in this country, 

 yet a very well authen- 

 ticated case was report- 

 ed in the National Live 

 Stock Journal in 1875, 

 in which a large flock in 



Missouri was stated to Figs. 1216, 1217.— The Tape-worm Encysted. 



(919) 



