134 EED MANGE ECZEMA KUBRUM. 



occurs, characterised by round, irritable patches of skin, from 

 which a secretion oozes, and which are denuded of hair. 

 The skin is at first red, swollen, and afterwards rough and 

 hard. In dogs the eruption occurs chiefly on the limbs and 

 scrotum. The general symptoms are loss of appetite, saliva- 

 tion, closure of the eyelids, great dulness, offensive exhala- 

 tions from the skin, and sometimes death. Recoveries occur 

 slowly. 



CHRONIC RED MANGE ECZEMA IMPETIGINODES. 

 This eruption is seen in dogs that have long been suffering 

 from red mange. The skin is very red and swollen, and the 

 vesicles are apt to run together. I have seen considerable 

 tumefaction of the skin over the scrotum, on the inside of the 

 arms and on the back, and these parts naturally denuded of 

 hair. Impetiginous eczema is essentially a severe form of 

 eczema rubrum. 



ECZEMA CHRONICUM, OR PSORIASIS. ' RAT TAILS/ 

 From inattention to the treatment of the form of eczema 

 already noticed, a chronic inflammation of the skin remains, 

 associated with some thickening, and not unfrequently with 

 the formation of cracks and fissures, whence flows an abun- 

 dant secretion. The hairs and cuticular cells are apt to be 

 matted together by the secretion, and produce a marked 

 roughness of the part affected. The popular name for this 

 disease in the horse has been ' rat tails/ from the peculiar 

 shape of the elevated patch of scabs felt usually over the skin 

 at the back part of the limbs of animals. Other names 

 used are ' mallenders/ for the disease in the fore-legs, and 

 ' sallenders' in the hind. Greve long since gave these condi- 

 tions their proper scientific names, and termed them Psoriasis 

 carpi et tarsi. Psoriasis occurs chiefly in long-haired ani- 



