and External Characters of the Hunting Leopard. 423 
narial aperture is large. (8) The posterior narial aperture is 
unique in size, its height from the palate to the presphenoid 
being approximately equal to its width. 
The Principal External Characters.—As I have said, the 
serval is almost as long in the leg and compressed in the 
body as the hunting leopard, but the latter entirely lacks 
the elasticity of gait and suppleness of body and limb so 
noticeable in all the typical members of the family. The 
head is rounded and relatively smaller than in any other 
genus ; but I can find nothing in the facial vibrisse, the 
rhinarium, or the ears generically distinctive of Aeinonyz. 
As in other Felidz, the interramal tuft of facial vibrisse is 
absent. The mystacial and superciliary tufts are shorter 
than in the majority of cats, and the two genal tufts are 
obsolete in the specimens examined. They are, as a rule, 
but not by any means always, conspicuous in the family, and 
it may be inferred that their functional, if not actual, 
suppression in Acinonyz, as well as the comparative shortness 
of the superciliary and mystacial vibrissee are an adaptation 
to life in open country. 
The rhinarium (fig. 2, B, C, D), when viewed from above, 
shows a tolerably large naked area, the hairs of the muzzle 
forming a convex line extending transversely from the poste- 
rior end of the narial slits. From the lateral aspect the 
rhinarium is prominent above, its edge sloping downwards 
and backwards to the upper end of the dilatable naked tract 
cleaving the upper lip. The deep gutter impressing this 
tract is continued upwards as a shallow groove between the 
anterior nares, which are comparatively large and encircled 
laterally by a narrow strip of naked skin. 
The ear (fig. 2, A) has a large bursa with the anterior flap 
or lamina deeply notched. The antero-internal ridge shows 
a small anguiar excrescence overlapping the base of the 
supratragus (plica principalis), which exhibits a large and 
rounded excrescence. The antero-external ridge ends in- 
feriorly in a long low tragus. ‘The postero-internal and 
postero-external ridges are well developed, and the latter 
carries a rectangular antitragal elevation fitting behind the 
tragus, 
The anus and external genitalia are normal. The area 
between the anus and the scrotum and the scrotum itself are 
hairy. The prepuce, which is close in front of the scrotum, 
is naked mesially, hairy laterally. The glans penis is short 
and subconical, with lightly convex lower margin, corre- 
spondingly concave upper margin, and pointed apex. Its 
surface is beset with lineally arranged spicules, which are 
