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BULLETIN 57, UNITED STATES NATIONAL MUSEUM. 
molars with the cusps normal in size and position ; m 3 with distinct 
entoconid and a slight postero-internal cingulum cusp. Skull (fig. 
26) with globular braincase rising abruptly above level of narrow, 
elongate rostrum. Greatest breadth of braincase about equal to depth, 
including audital bulla ; rostrum about three- fourths as long as brain- 
case, its width in lachrymal region about twice depth, its lateral walls 
thin and translucent, but not inflated. Anterior edge of orbit over 
middle of second molar. Antorbital canal very long, its anterior ori- 
fice over middle premolar, its posterior orifice occupying entire ante- 
rior wall of orbit, including region in which lachrymal foramen 
usually occurs. Base of braincase parallel with palate. Audital bul- 
lae well developed, but small, covering about half surface of cochleae. 
Externally characterized by the very 
long leg and tail, each of which exceeds 
the head and body in length, the large, 
funnel-formed ear (outer base slightly 
in front of inner), with thickened, dis- 
torted tragus, and the long muzzle with 
simple lips and chin ; nostrils simple, di- 
rected outward and slightly downward. 
Species examined. — I have examined 
the three known forms. 
Genus PHODOTES Miller. 
1906. Phodotes Miller, Proc. Biol. Soc. 
Washington, XIX, p. 85, June 4, 1906. 
Fig. 26. — Nataltjs mexicanus. Adult 
female. Morelos, Mexico. No. 
102509. x2I. 
T ype - species. — Natalus tumidirostris 
Miller. 
Geographic distribution. — Island of 
Curacao, off coast of Venezuela. 
Number of forms. — Only the type species is now known. 
Characters. — Like Natalus , but maxillaries conspicuously inflated 
and translucent, the swollen region extending from orbit to nares and 
projecting so far laterally that the molar teeth are hidden when skull 
is viewed from above. 
Species examined. — Phodotes tumidirostris (Miller). 
Remarks. — -The inflated, semitransparent maxillaries of the type 
species give the skull of Phodotes a very distinct aspect from that of 
Natalus and Chilonatalus. The rostrum of Nyctiellus is of somewhat 
the same form ; but this genus is distinguished by the very different 
relative width of rostrum and braincase, Phodotes retaining in this 
respect strictly the proportions of Natalus. As I pointed out in the 
original account of Natalus tumidirostris , a the palate in the only two 
a Proc. Biol. Soc. Washington, XIII, p. 160, October 31, 1900. 
