DISEASES OF THE SKIN. — EXTERNAL PARASITES. 207 



erally effectual in the treatment of ringworm. The following 

 is also a very useful application : — 



Whale-oil 6 ounces. 



Terebinth 2 ounces. 



Oil of Tar i drachm. 



. Acetic Acid i drachm. 



To be applied to the parts after first thoroughly washing the 

 skin with soft-soap *nd warm water, and repeated in tjvo days 

 and so on, as may be necessary. 



" Attention to hygifene is the principal object. Good food 

 and cleanliness must be insisted upon. Recovery will be 

 greatly accelerated by topical remedies. The scales should 

 be removed by washing the parts with soap and water, or 

 hyposulphite of soda lotion ; or, if the crusts are very ad- 

 herent, dressing them with oil and afterwards washing. The 

 diseased places may then be treated with a weak solution of 

 corrosive sublimate, carbolic acid, tincture of cantharides or 

 iodine, oil of tar, chloride of zinc, paraffine ; or mercurial 

 iodine, or oxide of zinc ointment. This cures the disease 

 very speedily, and promptly checks its extension. 



" If there is any emaciation, tonics may be necessary."* 



RINGWORM (Honeycomb). 



But little is known of this species of ringworm as affectmg 

 the dog. The disease, like the former, is due to the presence 

 of a fungus, the Achorion Sc/ionleinii, or Favus Tinea favosa. 

 The parasite is situated in the hair follicle, external to the 

 layer of epithelium which covers the root of the hair. It has 

 a peculiar mousey odor, or, according to others, that resem- 

 bling cat's urine. 



The causes giving rise to this affection are supposed to be 



* Fleming's " Veterinary Sanitary Science," vol. ii. p. 471. 



