DISEASES OF THE SKIN. 



705 



like the latter, on the skin of other creatures besides the horse. 

 Its existence is short, if conveyed 'to the skin of man, or of an 

 ox, sheep, dog, &c., and the form of horse mange which it 

 induces is, therefore, essentially confined to the equine species ; 

 and that form of mange with, which we are most conversant is 

 connected with the existence of this acarus. 



i'lO.' 129^~Dermatodeotes equl— (GtBLAOH.) 



SYMBIOTES EQUI. 



^TThia parasite, like the dermato^ectes equi, seems to live only 

 >on the horse ; and it is readily obtained from beneath the scales^ 



