. The families and genera of bats . Bats; Bats. 104 BULLETIN 57, UNITED STATES NATIONAL MUSEUM. entoconid, which is practically absent from m „. Skull (fig. 20) with rostrum slightly less than half as long as braincase, slender, slightly concave above, without supraorbital ridges or special widen- ing in interorbital or lachrymal regions, the postorbital processes reduced to the merest trace. Basisphenoid pits shallow but distinct, partly overhung by the concave-spatulate hamulars. Audital bullae small, their greatest diameter less than width of space between them. Sagittal crest low and indis
. The families and genera of bats . Bats; Bats. 104 BULLETIN 57, UNITED STATES NATIONAL MUSEUM. entoconid, which is practically absent from m „. Skull (fig. 20) with rostrum slightly less than half as long as braincase, slender, slightly concave above, without supraorbital ridges or special widen- ing in interorbital or lachrymal regions, the postorbital processes reduced to the merest trace. Basisphenoid pits shallow but distinct, partly overhung by the concave-spatulate hamulars. Audital bullae small, their greatest diameter less than width of space between them. Sagittal crest low and indistinct, bifurcating anteriorly into two lines terminating in the rudimentary postorbital processes. Species examined.—Megaderma carimatce Miller, M. spasma (Lin- naeus) , and M. trifolium Geoffrey. Remarks.—The genus Meyaderma is recognized among its allies by the nearly unmodified rostrum and lachrymal region, and by the notice- ably concave hamular processes. Genus LYRODERMA Peters. 1847. Euclieira Hodgson, Journ. Asi- atic Soc. Bengal, XVI. p. 891 (schistacea—lyra) ; not Eucheira Westwood, Trans. Entom. Soc. London, I, 1836, p. 44. 1872. Ltjrodcnna Peters, Monatsber, k. preuss. Akad. Wissensch., Ber- lin, p. 195 (subgenus of Megu- tlerma). 1907. Eucheira Andersen and Wroughton, Ann. Mag. Nat. Hist, 7th series, XIX, p. 134, February, 1907 (genus). Type-species.—Mey aderma ly ra Geoffroy. Geoyraphic distribution.—Penin- fig. 20.—megaderma spasma. tanjong sula of India, Ceylon, and southern Sika Kap, Johoke. No. 112733. xli. Phiim Number of forms.—Three forms are recognized by Andersen and Wroughton. Characters.—Similar to Meyaderma, but skull with noticeably widened frontal region, and distinct supraorbital ridges which show evident traces of incipient postorbital processes. Base of brain case noticeably elongated, the basisphenoid pits obsolete; hamulars small, the pterygoid scarcely concave between the process and basisphenoid pit. Teeth slightly more aberra
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