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Show 92 MR. K. ANDERSEN ON BATS [May 16, in its outline is produced, not by a heightening of the antenoi swellings, but by a reduction of the posterior pair ; these latter, which in all the allied species form a sort of transition between the anterior swellings and the adjacent part of the supraorbital crests and interorbital constriction, are in stheno so much reduced as to leave the anterior swellings more isolated, i. e., more abruptly projecting. Dentition, p., external; p2 and p4 in contact; p2 in row, cusp extremely small. Measurements. Below. Type. 6 ad. (in alcohol). Selangor, Malay Peninsula. Presented by H. N. Ridley, Esq. Brit. Mus. no. 98.3.13.1. Distribution. Selangor; Penang. Remarks. Rh. stheno differs from Rh. borneensis in the series of characters pointed out above. From Rh. nereis, in the shape of the facial portion of the skull, the much slenderer brain-case, and the shorter tooth-rows. From Rh. rouxi, in the shape of the facial portion of the skull; the much shorter metacarpals (although the forearm is of the same length as in smaller individuals of rouxi); the long III.2 (compared with III.1) ; the short IV .1 Measurements of Rhinolophus malayanus, nereis, and stheno. Eh. malayanus. Jilt, nereis. Tih. stheno. 3 specimens, 2 skulls. ? ad. Type. 4 specimens, | 3 skulls. Min. Max. Min. Max. mm. mm. mm. mm. mm. Ears, length .............................................. 16-2 16-8 17 17-5 „ greatest breadth ........................... 12 12'5 1 3 7 13 13-2 j Nose-leaves, total length ...................... 1 3 2 13-2 13-8 14-2 ,, breadth of horseshoe .. 7'8 8 9 8 8-3 1 Forearm............................................................ 41-2 42-8 ? 45 45-2 48 3rd metacarpal ......................................... 30 31 ? 33'2 3 1 5 32-7 I I I .1 ................................................................. 11-1 12 1 3 2 12-6 13 III.- ................................... 15'3 1 6 8 21 20-1 21-7 4th metacarpal ......................................... 30'2 31-5 33-7 33 33-8 IV.i ................................................................. 8-8 9 3 8-7 8-2 8-8 IV.- ................................................................. 10 10-5 12-8 11 12-5 5th metacarpal ......................................... 30 3 1 5 34 3 3 5 3 4 2 V.' ...................................................................... 9 7 9-8 10-8 9 10-4 V .2 ...................................................................... 9-7 10 102 10-5 11-5 Tail ................................................................. 1 9 2 20-5 17 15'5 17-8 Lower leg ........................................................ 16-8 17'8 21 19'8 20-8 Foot ................................................................. 7-8 9 3 8-5 9-2 Skull, total length .................................... 18-4 21'2 19-7 20-2 mastoid width ............................ 8'8 10-2 9-3 10 ,, width of brain-case...................... 8 9 5 8-5 8'7 ,, zygomatic width ......................... 9 2 10-8 10-1 ,, supraorbital length...................... 5-1 5 2 5-6 5 5"1 width of nasal swellings ........ 5'2 5-6 5-8 5'5 Mandible, leng th......................................... 12-1 12'7 13-2 I Upper teeth .................................................. 6-8 7 8-7 7-4 7'9 Lower teeth .................................................. 7-3 7 5 8 1 8-4 |