690 



DISEASES OF THE SKIN. 



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. 



Fig. 121. — Dennatodectes equi.— (Gerlach.) 



SYMBIOTES EQUI. 



" This parasite, like the dermatodectes equi, seems to live only 

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



