14. JIYSTACINA. , 443 



face-line ; .muzzle long, conical, terminated by the projecting extre- 

 mity of the nose, which extends far beyond the lower lip, and is 

 separated from the lateral portion of the upper lip by a groove on either 

 side ; nostrils very prominent, with thickened rounded margins termi- 

 nating the muzzle in front ; nasal apertures consisting of narrow ver- 

 tical slits directed sublateraUy with a groove between ; mouth small, 

 the upper lip projecting on all sides, as in the Molossi, beyond the 

 lower lip, but apparently not so expansible as in that group. Ears 

 oval, obtusely pointed, in general outline very similar to those of 

 Vespertilio dasycnenie ; but the outer margin of the conch is more 

 convex, the inner margin commences directly from the side of the 

 head without forming a lobe (in this respect agreeing with the sj)ecies 

 of this family), the outer margin terminates similarly: tragus long, 

 attenuated upwards subacutely pointed, and directed slightly in- 

 wards and forwards ; outer margin slightly convex, inner margin 

 correspondingly concave, a small erect tooth -like projection on the 

 outer side near the base ; a ridge passes backwards from the posterior 

 commissure of the eyelids to the base of the inner margin of the 

 tragus. 



Thumb long, armed with a large and very acute claw, which has 

 a small talon projecting from its concave surface near the base (see 

 P. Z. S. 1876, p. 487, fig. «) ; the feet have similarly long and very 

 acute claws, and at the base of each a similar talon is placed Q. c. 

 fig. h). The posterior extremities are short, the legs very short and 

 thick ; and the outer and inner toes shorter and thicker than the 

 others, as in other species of the subfamily, but they are not fringed 

 with long hairs. 



The feet are remarkably large, and much rotated outwards and 

 forwards so as to allow of easy progression. The structure of the 

 sole of the foot and of the inferior surface of the leg is very peculiar. 

 The plantar surface, including the toes, is covered with soft and very 

 lax integument, deeply wrinkled ; aud each toe is marked by a cen- 

 tral longitudinal groove with short grooves at right angles to it, as 

 in the lieptilian genus Hemidactylus. The lax wrinkled integaiment 

 covering the sole of the foot is continued along the inferior flattened 

 surface of the ankle and leg {I. c. fig. h). 



The antebrachial membrane is scarcely developed, a mere rudiment 

 of it exists in the angle at the elbow. 



"Wings from the ankles or tarsi ; calcanea feeble. The greater 

 part of the wing-membrane is exceedingly thin, but a narrow portion 

 along the forearms, the sides of the body, and the tibiae is remark- 

 ably thick and leathery, with numerous deep wrinkles, and of a 

 yellowish-brown colour, contrasting with the dark hue of the other 

 parts. Similarly the base of the iuterfemoral, as far as the point 

 where it is perforated by the tail, is thickened and wrinkled. Be- 

 neath this thickened portion of the volar membrane the wings 

 are folded, and it is evidently analogous to the thickened portion 

 of the anterior wings in Hemiptera and to the elytra of the Coleo- 

 ptera. 



The folded wing occuiucs a very small space, and this is due to 



