]2. TTLOSTOMA. 489 



Synopsis of the Species. 



a. Lancet-shaped nose-leaf notched along the 



sides ; calcaneum shorter than the tibia . . 1. T. crenulatum, p. 489. 



6. Lancet-shaped nose-leaf with an entire mar- 

 gin ; calcaneum longer than the tibia .... 2. T. longifoUum, p. 490. 



1. Tylostoma crenulatum. 



PhyUostoma crenulatum, Geoffroy, Ann. du Mus. xv. p. 183, pi. x. 



(1810). 

 Tylostoma crenulatum, Gervais, Exped. du Comte de Castelnau, Zoologie, 



p. 49, pi. Tiii. fig. 9 (1865). 



Crown of the head moderately elevated above the face-line ; muzzle 

 shortly cylindrical, obtuse in front, the distance from the eye to the 

 end of the muzzle is slightly less than the width of the space between 

 the eyes ; ears longer than the head, separate ; ear-conch oval, with 

 a short rounded-oif tip, lower half of the inner margin strongly con- 

 vex, then slightly concave, and again convex above : outer margin 

 straight or faintly convex, slightly notched opposite the base of the 

 tragus, beyond which it terminates in a convex lobe ; tragus very 

 narrow in upper third and acutely pointed, inner margin slightly 

 convex, outer with two narrow and very prominent projections 

 below ; nose-leaf large, equal to three fourths the ear in length ; 

 nostrils opening by oblique slits in the centre of the horseshoe-shaped 

 membrane, which has a thin free margin anteriorly and laterally, 

 and is bent up on either side opposite the nasal apertures ; erect pos- 

 terior leaf lanceolate, broadest at the base, with a narrow rounded 

 longitudinal central ridge extending from between the nostrils to the 

 extremity of the leaf, and, laterally, at its junction with the horizontal 

 leaf on either side, with a rounded lobule, succeeded by a notch, 

 above which the margin of the lancet is finely crenulate and fringed 

 with straight hairs ; lower lip and chin with a naked V-shaped space 

 in front, margined on the sides by transverse warts (Plate XXV. 



fig. 5). . . , 



Thiunb short, not so long as the foot, which also is small ; first 

 phalanx of the middle finger about one third the metacarpal bone ; 

 tibia long and slender; calcaneum slender, nearly as long as the 

 tibia ; interfemoral membrane large, extending, when expanded, be- 

 yond the feet, its free margin between the extremities of the long 

 calcanea straight ; tail extending almost to the middle of the mem- 

 brane, slightly beyond a line drawn between the knees, and appearing 

 by its extreme tip upon its upper surface. "Wing-membrane extend- 

 ing almost to the base of the toes. 



Fur dark brown above, somewhat paler beneath, scarcely extend- 

 ing upon the membranes. 



Upper middle incisors unicuspidate, conical, inclined slightly in- 

 wards ; outer incisors very small, also conical ; first upper premolar 

 with a vertically directed cusp, small, about the size of one of the outer 

 upper incisors ; second premolar nearly equal to the canine in cross 

 section at the base, but about half its size in vertical extent ; molars 



