ke 
1891.] Zoology. 749 
the center of this margin. Conch with seven diagonally transverse 
flutings appearing as furrows on the upper and as ridges on the lower 
surface, the posterior one being very slightly marked. On the outer 
surface, passing through the centers of these flutings, and at right 
angles to them, is a slight ridge formed by a doubling of theskin. The 
peculiar depressed angle formed by the juncture of the two lobes of the 
external margin of the conch (vide Fig. 4) gives to the ears of this 
species a peculiar drooping appearance that has suggested to me 
depressus as a fitting specific name. 
Nostrils circular, opening forwards, outwards, and very slightly down- 
wards. A prominent subcircular swelling between the eye and nostril 
and slightly below a line connecting them. Side of face with five 
flutings extending to lip. A deep furrow under eye. Face and chin 
nearly naked. Wing membranes from inner surface of distal ends of 
tibia and from calcanea, indefinitely edged with yellowish-white, more 
defined in centers of interdigital spaces and in center of the space 
between the fifth finger and tibia. Outer edges of first and fifth toes 
closely fringed with shortcurved white hairs; on the fifth toes, dorsal 
‘to this outer fringe, is a row of less numerous curved hairs, exceeding 
them about three times in length. From the upper surface of base of 
each claw spring three or four long curved hairs, about 8 mm. in 
length on chord. No gular pouch. Thumb with well-developed 
callosity at base of first phalanx. 
Teeth = = = = 
Upper incisors semi-conical, parallel, separated by space of 1 mm. 
Lower incisors bifid, crowded ; the middle pair in a straight line, the 
outer ones starting from near centers of inner surfaces of middle pair 
and diverging at an angle of 45° from them. Canines long, with dis- 
tinct, unbroken anguli, somewhat dilated on posterior-internal part of 
lower one, but not forming a true cusp. The upper canines are curved 
backwards, saber-shaped, passing 1.5 mm. below gums of lower teeth 
when the mouth is closed, the lower pair fitting into sockets between 
upper incisors and canines. First upper and lower premolars much 
smaller than second ones, in middle of spaces between these and 
canines. Second upper premolars decidedly longer than molars, with 
very acute outer cusps; the internal cusps not particularly developed, 
as is the case with macrotis. 
Measurements in millimeters from alcoholic specimen: Length of 
head and body, from tip of nose to base of tail, 79; length of tail, 
52; length of -tail beyond interfemoral membrane, 33; length of 
Am. Nat.—August.—5. 
* 


