254 Mr. R. I. Pocock on 



of the inferior edge of tlie pinna. Tlie notch between the 

 antitragus and the small flap-like tragus is deep. The supra- 

 tragus is a small ridge continuous posteiiorly with tlie upper 

 curved edge of the cavity of the pinna and overlapped in 

 front by a flap of the pinna continuous with the overt'olded 

 supero-anterior edge. Below the supratragus this flap 

 terminates near the middle of the anterior portion of the 

 cavity of the pinna. 



The ear is capable of being folded by the forward move- 

 ment of its posterior half up against its anterior half, so that 

 the central cavity is obliterated and the external auditory 

 meatus closed by the antitragus coming into contact with the 

 tragus. 



I am unable to find any differences of importance between 

 {he ears of Nopale jacchus and those of Leontocehiis rosalia, 

 unless it be that in Leontocehus the depression on the lower 

 portion of the lamina extends a little further forwards on to 

 the antitragus. This character may be inconstant. The ears 

 fold in the same way as in HapaJe. 



In (Edipomidas cedipxis, however, the ears are very different. 

 T4iey are relatively much smaller and quadrate in slnipe, 

 both the upper and the posterior borders being markedly 

 angled. The edge in front of the upper angle is folded ; 

 elsewhere the edge is simple. The flap-like area of the pinna 

 above the central cavity is wide and deep, as in Hapale; but 

 below the posterior angular point the flap rapidly narrows, 

 and disappears entirely behind the antitragus, there being no 

 broad laminate flap completing the pinna below and standing 

 away from the cartilaginous basal portion of the ear. The 

 antitragus forms a large fleshy valvular flap, but the tragus 

 itself is very small. The ear folds as in the other species, 

 the posterior angular point turning backwards. The only 

 member of the Hapalidse which resembles (Edipomidas 

 adipus in the size and structure of the ear is its near ally 

 (E. geqffroyi. In all the other species that I have examined 

 the ear is of the type described in Hapale and Leontocehus in 

 the sense that the free lamina of the pinna arises interiorly 

 beneath the antitragus and close behind the notch between 

 the tragus and antitragus, and extends right round the carti- 

 laginous capsule of the pinna, standing everywhere well away 

 from the head. 



Since, however, I have been dependent mostly upon dried 

 skins, 1 cannot speak positively of the exact shape of theeais 

 in all cases. Such species as Mystax midas and M. mystaA; 

 for example, appear to have tlie posterior edge of the ear 



