. Catalogue of the mammals of western Europe (Europe exclusive of Russia) in the collection of the British Museum. NYCTINOMDS 279 slight convexity over anterior two-thirds of brain-case, and a more aV)rupt though not very conspicuous swelling posteriorly, the two convexities separated by a narrow concavity ; general direction of dorsal profile more nearly horizontal than in any other European bat, since the depth of occiput through condyles is scarcely greater than that of rostrum through anterior portion of tirst molar. Brain-case low and wide, its depth at middle about half mastoid breadth,
. Catalogue of the mammals of western Europe (Europe exclusive of Russia) in the collection of the British Museum. NYCTINOMDS 279 slight convexity over anterior two-thirds of brain-case, and a more aV)rupt though not very conspicuous swelling posteriorly, the two convexities separated by a narrow concavity ; general direction of dorsal profile more nearly horizontal than in any other European bat, since the depth of occiput through condyles is scarcely greater than that of rostrum through anterior portion of tirst molar. Brain-case low and wide, its depth at middle about half mastoid breadth, its surface smooth and evenly rounded, with faintly indicated sagittal crest posteriorly and median groove between latei-al swellings anteriorly; lambdal crest evident though not high ; outline of brain-case when viewed from above a somewhat triangular ovate owing to the rather squarely truncate posterior border and the strong contrast between the wide mastoid region and narrow interorbital con- striction ; floor of brain-case with median ridge and lateral depressions posteriorly, the basisphenoid with two shallow but rather well-delined pits about as large as glenoid surface; auditory bulhe rather large, deeply emar- ginate on inner side so that cochlea is conspicuously exposed, the region in front of middle of meatus reduced to a narrow ring barely more than one-third as wide as meatus, the extreme anterior border with a flange-like inward-curved projection. Interorbital region long, sub- cylindrical, a little wider at lachrymal level than posteriorly, but scarcely enough so to impart a distinctly hour-glass general form ; least interorbital breadth slightly greater than breadth of tubular narial region and slightly less than that across roots of canines. Zygoma simple, not bent upward, its margin with a barely indicated expansion behind middle. Rostrum proper short and deep, not w^ell difierentiated from interorbital region, the distance from orbit to front of pre- maxillary
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Keywords: ., bookcentury1900, bookcollectionbiod, bookdecade1910, bookyear1912
