. Bulletin - United States National Museum. Science. 258 BULLETIN 57, UNITED STATES NATIONAL crown area iiioiv lliaii lialf (hat of first inolai', its antci'o-intcrnal ciisp woll (levploiu'd. Lower premolars not jieciiliar, the bases of the crowns ahout as lono- as broad, tlie shaft of the anterior not as liigh as that of posterioi'. but with about the same area in cross section. Molars normal; /// ' and ni - with the inner section somewhat reduced but with distinct hypocone; in''' with or witliout distinct metacone and third commissure; lower molars with the cusps in the usual posi-
. Bulletin - United States National Museum. Science. 258 BULLETIN 57, UNITED STATES NATIONAL crown area iiioiv lliaii lialf (hat of first inolai', its antci'o-intcrnal ciisp woll (levploiu'd. Lower premolars not jieciiliar, the bases of the crowns ahout as lono- as broad, tlie shaft of the anterior not as liigh as that of posterioi'. but with about the same area in cross section. Molars normal; /// ' and ni - with the inner section somewhat reduced but with distinct hypocone; in''' with or witliout distinct metacone and third commissure; lower molars with the cusps in the usual posi- tion, but entoconid freiiuently reduced or obsolescent in ni ... Skidl (figs. 45-47) strongly built, though rather sleiuler and with sagittal crest absent or slightly indicated, the rostrum well developed, always more than half as long as brain case, the entire dorsal profile from nares to occiput nearly straight, or at least with no strongly contrasting ele- vati(ms and depressions; interorbital region and rostrum subterete, in most of the species distinctly hour-glass shaped; a slight lachrymal ridge; pal- ate slightly arched, with or without a small median anterior foramen, the premaxillaries without trace of pala- tal branches; pterygoids parallel; basisphenoid pits present,well defined. External form slender, much as in NyctiuoDi us. P]ars very large, rounded or squarish in outline, joined across forehead, extending slightly beyond nostril when laid forward, the ante- rior margin without horny processes; antitragus distinct but not thickened; keel greatly developed, flattened and expanded at edge; tragns small, flat, its u})per edge squarish or rounded; lips full and expanded, though not conspicuously wrinkled. Muzzle pad Avell developed, deeply emarginate above, its upper edge and median ridge w^th minute horny pi'ocesses and small spoon hairs. Wings, feet, tail, and membranes not peculiar. Species exajmned.—Eumops ahrasus (Temminck), E. honaricnsh (Peters), E. califor
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
