. Bulletin - United States National Museum. Science. THE FAMILIES AND GENERA OF BATS. 185 known specimens is deeply eniarginate posteriorly to level of middle molar. This contlition 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^-LONATALUS Miller. 1898. Chiloiiafaltis Miller, I'l'oe. At-ud. Nat. St'i. I'liiladelpbia, p. 326 (sub- senus of Xutaliis). 1903. ChiloiKituliis Miller, Proc. Biol. Soc. Washington, XVI, p. 119. Sep- tember :!0. 1908 (genus). Typc-speclt'.s
. Bulletin - United States National Museum. Science. THE FAMILIES AND GENERA OF BATS. 185 known specimens is deeply eniarginate posteriorly to level of middle molar. This contlition 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^-LONATALUS Miller. 1898. Chiloiiafaltis Miller, I'l'oe. At-ud. Nat. St'i. I'liiladelpbia, p. 326 (sub- senus of Xutaliis). 1903. ChiloiKituliis Miller, Proc. Biol. Soc. Washington, XVI, p. 119. Sep- tember :!0. 1908 (genus). Typc-speclt'.s.—Xafahix >iiirropus Dobson. Gcixji'dph'ic dhtrlhid'ioit.—Bahama Islands. Greater Antilles (Cuba, Jamaica), and Old Providence Island, Caribbean Sea. Nuniher of forms.—Three species of Ch'doiKttalus are now recognized. Characters.—DiU'ers from Xatalus 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 Xatalus., but with rostrum relatively longer, more slender, and more depressed posteriorly. Species examined.—Chilonatalus m icro- j)us (Dobson), C. hrevimamis (Miller), and C. tiniiidlfro)iS (Miller). Rem arks.—Although dist i n g u i s h e d chief!}' by external characters, this genus difl'ers from Xatcdns in the excessiveh' attenuate, flattened rostrum. It contains the smallest known nimibers of the family, XyctieUi/s lepidus excepted. Genus NYCTrfELLUS Gervais. 1855. Nyctielhts (tERVAis, Exped. du Comte de Castelnau, Zool., Mamm., p. 84. 1866. 'NycticcUus Gray, Ann. and Mag. Nat. Hist, .3d ser., p. 91. February, 186(1 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.—Vespertilio lepidus Gervais. Geographic distrihvtion.—Cuba, includi
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