13f) IMPETIGO LABIALIS S. FAOIALIS. 



lower animals. One is a small pustule, often irregularly 

 circumscribed, producing but a slight elevation of the cuticle, 

 and terminating in a laminated scab. The second is com- 

 monly of a large size, raised on a hard, circular base, of 

 a vivid red colour, and succeeded by a thick, hard, dark- 

 coloured scab. There are two kinds of pustular eruption to 

 describe, viz., impetigo and ecthyma. 



IMPETIGO LABTALIS s. FACIALIS. 



Professor Roll, of Vienna, refers to this malady in the fol- 

 lowing terms: " There occurs amongst horses with a white 

 face, and only at pasture, an eruption which consists in small 

 pustules, over which yellowish crusts form, which adhere to 

 the rough and thickened skin. An ointment is required to 

 favour the separation of the scabs, and no further treatment 

 is called for." Eychner, of Berne, speaks of the disease as 

 common, but in Britain it had not been described until 1860, 

 when one of my students, Mr George Robertson, now prac- 

 tising at Ellon, favoured me with a communication on a 

 " White face and foot disease/' It had never been heard of 

 in Mr Robertson's district until the year 1857, and Mr 

 R.'s observations were made in the month of July, 1860, when 

 he was requested to attend a mare with an eruption in 

 the face. In the course of a week, the whole of the ani- 

 mals on the farm were affected with the exception of one 

 mare, which had neither white hairs on the face nor on the 





Mr Robertson has informed me that, as the name given to 

 the disease implies, it is strictly confined to the white skin, 

 over which small pimples or pustules form. There is much 

 irritation, and the rubbing resorted to by the animals to allay 

 the itchiness leads to excoriations of the skin, which, if roughly 

 touched, bleeds freely. The eyelids become swollen, and 



