THE FAMILIES AND GENERA OE BATS. 
185 
known specimens is deeply emarginate posteriorly to level of middle 
molar. This condition is probably due, at least in part, to faulty 
preparation, but it seems not improbable that the posterior region of 
the palate is extensively and irregularly fenestrate. 
Genus CH'I-LONATALUS Miller. 
1898. GMlonatalus Miller, Proc. Acad. Nat. Sci. Philadelphia, p. 326 (sub- 
genus of Natalus). 
1903. GMlonatalus Miller, Proc. Biol. Soc. Washington, XVI, p. 119. Sep- 
tember 30, 1903 (genus). 
Type-species. — Natalus micropus Dobson. 
Geographic distribution. — Bahama Islands, Greater Antilles (Cuba, 
Jamaica), and Old Providence Island, 
Caribbean Sea. 
Number of forms. — Three species of 
Chilonatalus are now recognized. 
Characters. — Differs from Natalus in 
the presence of a ridge-like dermal out- 
growth on muzzle, suggesting a rudimen- 
tary noseleaf, and another on chin, pro- 
ducing in profile a double-lipped aspect; 
males, with large glandular swelling be- 
tween and in front of eyes. Skull (fig. 
27 ) like that of Natalus , but with rostrum 
relatively longer, more slender, and more 
depressed posteriorly. 
/Species examined. — -C hilonatalus micro- 
pus (Dobson), C. brevimanus (Miller), 
and C. tumidifrons (Miller). 
Remarks. — Although dist inguished 
chiefly by external characters, this genus differs from Natalus in the 
excessively attenuate, flattened rostrum. It contains the smallest 
known numbers of the family, Nyctiellus lepidus excepted. 
Fig. 
27. — Chilonatalus 
X 2f. 
Genus NYCTMELLUS Gervais. 
1855. Nyctiellus Gervais, Exped. du Comte de Castelnau, Zool., Mamm., 
p. 84. 
1866. Nycticellus Gray, Ann. and Mag. Nat. Hist., 3d ser., p. 91. February, 
1866. 
1878. Natalus Dobson, Catal. Chiropt. Brit. Mus., p. 341 (part). 
1904. Nyctiellus Miller, Proc. U. S. National Museum, XXVII, p. 340. 
January 23, 1904. 
Type-species. — V espertilio lepidus Gervais. 
Geographic distribution. — Cuba, including the Isle of Pines. 
Number of forms. — The type species is the only form thus far dis- 
covered. 
