THE FAMILIES AND GENERA OF BATS. 
233 
commissures well developed, the area of the crown about half that 
of first or second ; lower molars with all the cusps present and normal 
in form, no great contrast in height of protoconid and hypoconid 
in m t and m 2 . Skull (fig. 38) slender and lightly built, the braincase 
large, smoothly rounded and abruptly elevated anteriorly, the rostrum 
slender and weak. There is no indication of sagittal crest or of 
supraorbital or lachrymal ridges. Nares very narrow, the width 
of the aperture as viewed from above scarcely or not half the length. 
Anterior palatal emargination about as wide as deep. Posterior 
extension of palate narrowed gradually backward, much as in Nata- 
lus; hamulars very short. Audital bulla? very- small, covering much 
less than half surface of large 
cochleae. Ears moderately long (ex- 
tending slightly beyond nostrils when 
laid forward), separate, slightly fun- 
nel-formed owing to the fact that 
the outer border arises slightly in 
front of the inner, and its lower por- 
tion is unusually widened ; tragus 
long and very slender. Muzzle sim- 
ple. Third and fourth metacarpals 
about equal, fourth slightly shorter. 
Species examined. — Kerivoida af- 
ricana Dobson, K. brunnea Dobson, 
K. liardwickii (Horsfield), K. harri- 
soni Thomas, K. minuta Miller, K. 
papillosa (Tennninck), K. papuensis 
Dobson, K. picta (Pallas), K. pu- 
silla Thomas. 
Remarks . — Among Old World bats 
the members of this genus are recog- 
nizable by their small size, delicate 
form, distinctly funnel-shaped ears, 
with very long, slender tragi, and the absence of peculiar develop- 
ments of the nostrils, canines, or other parts. The fur is long and 
soft, and in some species the wing membranes have a conspicuous 
color pattern. Superficially they resemble some of the Natalidse, 
but the lengthening of the legs and tail is much less. 
Genus PHONISCUS Miller. 
1905. Plioniscus Miller, Proc. Biol. Soc. Washington, XVIII, p. 229, Decem- 
ber 9, 1905. 
Type-species. — Plioniscus atrox Miller. 
Geographic distribution . — Eastern Sumatra. 
Number of forms . — Only the type species is known. 
Fig. 38.— Kerivoula hardwickii. Adult 
male. Western Java. No. 141591. -x2|. 
