102 PTEROPIDE. 
small; upper subtrigonal; lower smaller, circular; lower false 
grinder rather large, truncated, with an oblong crown; upper 
wanting; upper cutting-teeth rather wide. Face shorter and wider 
than in P. nawaiensis, No. 14, from Nawai. 
5. Spectrum leucopterum. B.M: 
Fur very soft, uniform pale whitish brown; underside duller ; 
wings thin, very pale brown, whitish at the tips; the back, shoulders, 
and nearly the whole length of the forearm with close-pressed hairs ; 
thighs and legs with woolly hair. Forearm 54 inches. 
Pteropus leucopterus, Temm. Esq. p. 50. 
Hab. Philippines, Verreaux. 
2. PTEROPUS. 
Head elongate; face produced, broad. Ears large, produced, 
acute. Fur soft, of the back adpressed, of the underside more 
spreading, fuller. Wings from the sides of the back. Back, shoul- 
ders, part of the forearm, and the thighs hairy. Thumb, lower 
joint short, the upper longer; the lower joint and the base of the 
upper are enclosed in the front membrane, the rest free. Tail none. 
Interfemoral membrane moderate, margining the legs and thighs. 
The gland of the penis armed with a broad bone. 
Pteropus, sp., Brisson, Geoff, Gray, Peters. Acerodon, Jourdan, 
Ann. Sci. Nat. viii. p. 376. 
The wings are generally from the sides of the back; in some species 
they are extended backwards so as to be attached to the sides of the 
middle of the back; but in some stuffed specimens the manner in 
which they are attached is not easily determined, as the skin of the 
back appears sometimes to be stretched in width. If one had 
living specimens to examine and could observe their habits, I have 
no doubt that those with the wings from near the centre of the back 
would have some habit different from those that have them affixed 
to the sides of the body; but our system cannot go further than the 
specimens at our command admit. — 
The species may be thus divided :— 
I. The nape and the back of the neck yellow or red, forming a 
bright tippet. 
* Orbits paler. No. 1. 
** Orbits like back. Size large. Nos. 2-7. 
*%** Orbits like back. Size small. Nos. 8-21. 
II. Nape like back; shoulders with a tuft on each. No. 22. 
III. The nape and back of the neck like the rest of the body, or 
only whiter. 
* Face uniform. Nos. 23-27. 
** Face with brown streaks. No. 28. 
#** Face with white streaks. No. 29. 
