20 VETERINARY PARASITOLOGY 
ol. picis may be replaced by ol. tereb., or by tinct. iodi, 
and soap may be substituted for oil—viz. : 
BR Sulph. nig... es os .. Bij. 
Liq. potasse .. oe o7 .. 58s. 
Ol. tereb. 2s ig ee .. 5vj. 
Sapo. mollis .. oe ei .. BUSS. 
SVR. 5s a ais oe .. Bij. 
Aqua ae si e2 ad $viij. 
M. Fiat lin. 
Creosote, carbolic acid, and tar dressings must not be 
used on smail dogs, and only with caution on the larger 
breeds, and must be avoided altogether in the case of cats. 
Chinosol, lysol, and iodine are safer, but precautions 
must be taken against licking off the dressing. 
In cats sulphur ointment is most useful, but only a 
small portion of the body should be covered at one time 
with any greasy dressing. 
Symbiotic Mange in Dogs and Cats.—Svmbiotes auricu- 
larum confines itself to the inside of the ear. The para- 
site produces a great variety of symptoms, some of 
which arise from irritation and some as the result of 
nervous reflexes, while others may be ascribed to changes 
in the ear, such as abscess formation. 
The most characteristic symptoms are flapping of the 
affected ear or ears, shaking the head, and rubbing the 
ears against hard objects. Often the head is carried to 
one side. 
In other cases epileptic fits result from the irritation 
produced, and on several occasions cases have come to 
our notice in which the dog continually turned somer- 
saults along the ground, and this, in fact, seemed the 
only mode of locomotion. When deeply seated, the 
Symbiotes may be responsible for the formation of 
abscesses, which may account for the aggravated symp- 
toms just described. The abscesses develop in the 
middle or internal ear, with accompanying loss of 
