Saccopteryx ec. from South America. 367 
S. leptura, I cannot believe that this very differently coloured 
bat, which more resembles Rhynchonycteris naso in its general 
appearance, should be assigned to that species. Schreber’s 
animal is figured as dark brown, without any trace of supra- 
orbital white streaks, and is therefore clearly the darker 
coloured of the two forms. 
Saccopteryx gymnura, sp. n. 
Size about as in S. leptura. Lars narrow, generally 
shaped as in S. leptura, but with a slight concavity at the 
upper third of the inner margin, as in S, canescens. ‘Tragus 
of median length, its inner and outer margins straight, its 
tip rounded off. Nostrils and lips as in S, leptura. Feet 
quite different from those of the other members of the subgenus 
Saccopteryx, for instead of being long and wholly free of the 
membranes, they are short, stumpy, and involved in the mem- 
branes, the wing-membrane being attached towards the distal 
end of the metatarsus and the calear being bound to the foot 
nearly up to the base, of the fifth toe. Waing-sac as in the 
restricted Saccepterya, Base of interfemoral membrane 
practically naked above, contrasting in this respect with the 
other species; there are a few fine hairs on this part, but 
they are almost imperceptible. 
Colour apparently, so far as can be judged by a spirit- 
specimen, dark throughout, as in the true S. leptura, The 
centre of the back has unfortunately lost its fur, so that I 
cannot say if light stripes were present ; in all probability they 
were, 
Skull in its size and delicate build closely similar to that 
ot S. canescens, but the postorbital processes are very much 
nore developed, standing boldly out to the level of the zygo- 
mata (see measurements). 
Dimensions of the type (in spirit) :— 
Forearm 35 millim. 
Head and body 37; tail 14°5; ear 13; tragus (on inner 
edge) 2°55; tibia 13; hind foot, s. u. 4, ¢c. u. 4°5; calear 11. 
Skull: extreme length 12:7; basal length 10-4; zygo- 
matic breadth 8; interorbital breadth 3:3; tip to tip of post- 
orbital processes 5°9; intertemporal breadth 1°7; breadth of 
brain-case 6°1; length of upper molars 2°7; front of lower 
canine to back of m.s 5. 
Hab. Santarem, on the Amazon. 
Type. Female. B.M. no. 75. 10. 22. 2. Specimen e¢ of 
S. leptura in Dobson’s Catalogue. Collected by Mr. Wickham, 
‘Lhe marked difference in the structure of the feet, in which 
25* 
