CHARACTERS OF THE SUIDiE. 539 



In the two species of Peccary {D. tajacu and pecari) I have 

 found all the tufts developed as described above, and, in addition, 

 the two genal tufts, the loAver situated in a line with the slit of 

 the mouth and beneath the anterior angle of the eye, the upper 

 higher up and beneath and behind the posterior angle of the eye. 

 (Text-fig. 36, B.) 



In Potamochocrus porcus the ocular and interrainal vibi-issse are 

 well developed, and I detected two genal tufts, the upper situated 

 as in JJicoti/les, the lower set very far back beneath the base of 

 the ear on the angle of the lower jaw. The upper tuft, however, 

 was only distinguishable from the normal coarse hairs of the 

 cheek by rising from a low integumental swelling, and the 

 liomology of the lower tuft with that of Dicotyles is rendered a 

 little doubtful by its abnormally backward position. (Text- 

 fig. 36, A.) 



In dried skins of Poreula salvania the buccal, ocular, and 

 interramal vibri.ssse are normally developed, but the genals are 

 indistinguishable. 



In Phacochcants the buccal and ocular vibriss?e alone seem to 

 be constant. In one case I detected a few bristles set about 

 one inch below the subocular wart, which I believe to represent 

 the upper genal tuft; but I could find no trace of the lower genal 

 tuft, unless a short row of black bristles beneath the white fringe 

 on the cheek is to be referred to it. The interramal is repre- 

 sented at most by one or two long bristles. 



In dried skins of Hylochcerus the buccal and ocular vibrissse 

 are as in Phacoclioerits, but the genals are not traceable in the 

 long hairs of the cheek. I may here add that the fringe of pale 

 hair on the cheek in Hylochaerus seems to overlie an area of skin 

 with special glandular activity. 



The Ear. 



Boas (Die Ohi'knorpel . . . der Saugethiere, 1912) describes and 

 figures the ears of Sus scrofa and Dicotyles tajacu. Each is 

 provided with tliree supporting ridges, the anterior of which is 

 curved backwards at the base, where it arches over a deep groove 

 bovmded below by an oblique thickening or ridge, which is itself 

 defined by a deep groove from the basal thickening which descends 

 to the auditory orifice. The anterior edge of the pinna is turned 

 backwards in both genera, and the posterior edge as well in 

 Dicotyles. At the base of the anterior edge there is a small 

 excrescence. 



In Potamochm^us porcus the anterior edge is folded backwards 

 at the base, but there are no definite tragal or antitragal 

 thickenings. There is a feebly-developed anterior and posterior 

 supporting ridge, and the former rises inferiorly close to the 

 basal thickening, which is divided into an upper and a lower 

 part by a deep groove or cleft. The part above this groove forms 

 an abbreviated longitudinal thickened ridge, well defined in 



