LOUPIXG-ILL. 



565 



borne out by a circumstance well known to flockmasters and 

 shepherds, namely, that sheep reared in districts free from loup- 

 ing-ill are much more liable to take the disease, when subjected 

 to its cause, than those reared where the disease and ticks 

 prevail. 



Fig. 35. 



Cultivations from Blood op Tick. 



(Drawing by Dr. Jas. Hunter, 1882.) 



XI200 



a. Double row splitting into two single rows, which separate longitudinally. 



h. Double row in another stage of division. 



c. Two single rows lying nearly parallel, d. A single rod. 



e. Zoogloea with disintegrating segments. /. Zoogloea with free segments. 



It will be noticed that the mycelia or filaments and bacilli or 

 rods differ in size, and to some this seems antagonistic to the 

 view that it is a specific organism. 



It must, however, be rememlDcred that these different appear- 

 ances are due to the varying ages of the growth, and that the 

 organism seems only to arrive at maturity in the spinal canal, 

 where, in the myxa sometimes there found, it may be seen in its 

 highest development, and it is not denied that the organism 

 may be multiple. 



Dipping the sheep with any of the recognised sheep-dips will 

 also destroy the ticks, but this procedure cannot be very con- 



