1905. | OF THE GENUS RHINOLOPHUS. 91 
of canine 21-2 [18-2-20]; length of brain-case, inion to anterior 
point of proencephalon 13-7 [11-3-12°5]; width of brain-case above 
zygomata 9°5 [7-9-8:2]; zygomatic width 10°8 [9-9-91; maxillar 
width, across antero-exterior corners of m* 8°5 {6°8-7-2]; inter- 
orbital constriction 2:2 [2°4-2°8]; palatal bridge, median length 
2°6 [1°8-2°3]; maxillar tooth-row 8°7 [7-7-6]; extreme width of 
m! 2-2 [1°5-1°9]. 
Dentition. I have not seen the mandible of this Bat. p° in 
row; cusp almost imperceptible. 
Measurements*. On p. 92. 
Type. 2 ad. (in alcohol). Pulo Siantan, Anambas Group ; 
September, 1899. Collected by Dr. W. L. Abbott. Un. St. Nat. 
Mus. no. 101714. 
Remarks. As already pointed out above, the Bats of the 
borneensis type inhabiting the 8. Natuna and Karimata groups, 
rather close to the north-western and western coasts of Borneo, 
are so extremely like the typical borneensis as to be, perhaps, 
searcely separable. But farther westwards, on the much more 
isolated Anambas Islands, the borneensis type has developed into 
the present, peculiarly modified species. In the lengthening of 
I11.7, the shortening of IV.!, and the shortening of the tail (com- 
pared with the tibia), Rh. nereis has taken the same course as the 
still more western Lh. stheno (described below). But the shape 
of its skull sufficiently proves it to be an offshoot, not of that 
species, but of 2h. borneensis. Compare with this the “remarks ” 
under 2h. stheno. 
10. RHINOLOPHUS STHENO, sp.n. (Plate IIT. fig. 8, a, 6.) 
Diagnosis. Allied to Rh. borneensis, but anterior nasal swellings 
much more projecting. Lower leg long: 19°8-20°8 mm. Tail 
extremely short: 15°5-17°8mm. Slightly larger than borneensis : 
forearm 45-2-48 mm. 
Details. This is a third modification of the borneensis type, in 
several respects recalling Rh. nereis, in others quite peculiar. 
The shape of the facial portion of the skull is unique within the 
present group. As in Rh. nereis, III" is lengthened, IV.’ 
shortened; the tail is extremely short. The general size of the 
animal is slightly increased. 
Plagiopatagium inserted 1-3 mm. above the ankle-joint. 
Colour. 3 ad., Penang; teeth unworn; skin.—General 1n- 
pression: reddish brown above; under side much lighter, con- 
trasting with the upper side. ‘“ Mars-brown” above; base of 
hairs light “drab”; under side almost “ broccoli-brown.”— 
Three spirit-specimens (Selangor; teeth unworn) apparently 
agree In colour with the skin. 
Skull (three individuals). Owing to the much more projecting 
anterior nasals wellings, the skull of Rh. stheno, in side view, is 
strikingly different from that of Rh. borneensis. This peculiarity 
* The tip of the ears and the posterior nose-leaf are damaged ; forearms broken. 
