398 MR. R. I. POCOCK ON THE EXTERNAL 



instead of being subcircular are markedly elongated from above 

 downwards, and the internarial septum is long and narrow. The 

 inf ranarial portions are deep, and are defined by a groove from 

 the adjoining central portion, which has no trace of median 

 groove. 



To Beddard's description of the rhinarium of Bassaricyon as 

 naked and marked with a median groove which also cleaves the 

 upper lip and is visible on the dorsal side, I may add that in 

 the specimen examined by me, the upper edge, when seen from 

 the front, was lightly biconvex, the median groove was well 

 marked and complete, the philtrum was short but barely as wide 

 as the internarial septum, and that the infranarial portion on 

 each side was exceedingly deep and marked with a faint trans- 

 verse groove, meeting its fellow of the opposite side in the middle 

 line ; and that the total width of the rhinarium exceeded the 

 height from the edge of the upper lip to the summit, the snout 

 being short as in Potos, and not produced as in Bassariscus and 

 Procyon. 



In Potos the snout is not produced or slender, and the rhina- 

 rium is remarkable for the great width of the philtrum, which is 

 as wide as or wider than the internarial septum, its sides often 

 diverging below, and the greatest width of the rhinarium exceeds 

 its height from the summit to the edge of the upper lip. The 

 upper edge, seen from the front, is convex or lightly biconvex, 

 the internarial septum is wide, the infranarial portions are very 

 deep, gradually narrowing beneath the slit-like portions of the 

 nostrils laterally. There is a well-marked median groove running 

 from the edge of the lip and sometimes extending on to the 

 upper surface in front, and a faint subhorizontal groove runs 

 inwards beneath the nostril to meet its fellow of the opposite 

 side in the middle line. 



In Ailuriis the snout is not produced, and the upper lip is 

 divided by a short narrow philtrum, much narrower than the 

 internarial septum, and the greatest width of the rhinarium 

 considerably exceeds its height from the summit to the edge of 

 the upper lip. The upper edge is tolerably evenly convex or 

 markedly biconvex, the internarial septum is wide, and the 

 infranarial portions are comparatively shallow, each being marked 

 by a faint groove which extends obliquely downwards and in- 

 wards to meet its fellow of the opposite side in the middle line. 

 The median groove is well marked, and extends from the edge of 

 the upper lip often on to the summit of the rhinarium. 



So far as it is possible to judge from the mounted specimen of 

 Ailuropoda, the rhinarium resembles that of Ailurus in all 

 respects, especially in the shortness and narrowness of the 

 philtrum. except that its upper surface is entirely covered with 

 hair. In this respect it differs from that of all the genera of 

 so-called Procyonidaa and Ursidse. 



I was unable to satisfy myself as to the protrusibility of the 

 lips in Ailuropoda, although the lower lip, as mounted, is slightly 



