. Les familles et genres de chauves-souris . Les chauves-souris, les chauves-souris. Dents sans modifications spéciales. Les incisives supérieures en contact les uns avec les autres, mais séparé du large par canine, près de diastème terete, leurs couronnes légèrement aplati antéro-postérieurement, la dent intérieure de chaque paire légèrement plus long que l'extérieur. Incisives inférieures légèrement aplati latéralement, l'extérieur de chaque paire légèrement plus grand ; la fine pointe émoussé, presque plat, bien que divisée par une encoche en deux lobes bien en-. Les canines inférieures et supérieures avec un deuxième point sur la face interne formé par une légère prolonga- tion de l'cingul

• Contributeur: Central Historic Books / Alamy Banque D'Images
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• Dimensions: 1886 x 1325 px | 31,9 x 22,4 cm | 12,6 x 8,8 inches | 150dpi

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. The families and genera of bats . Bats; Bats. Teeth without special modifications. Upper incisors in contact with each other, but separated from canine by wide diastema, nearly terete, their crowns slightly flattened antero-posteriorly, the inner tooth of each pair slightly longer than the outer. Lower incisors somewhat flattened laterally, the outer of each pair slightly the larger; cutting edge blunt, nearly flat, though divided by a shallow notch into two in- conspicuous lobes. Canines both above and below with a secondary cusp on inner side formed by a slight prolonga- tion of the cingulum and some- what variable in its develop- ment in different species. An- terior upper premolar perma- nent, but scarcely larger than incisor in cross section and so short as barely to penetrate the gum. Its crown is nearly flat, though with a faintly in- dicated antero-external cusp. The corresponding lower tooth is considerably larger, its disk- shaped crown somewhat con- cave except for the minute antero - external cusp. The three suceeding cheek teeth almost exactly resemble each other above and below; pm z and pm 3 are higher and shorter than the others, and the inner ridge tends to form a blunt cusp opposite base of main cusp; pmi, m1, pm±, and w^ have the longitudinal furrow well de- ' veloped and bounded on the inner side by a distinct, though low, ridge, and on the outer side by a much higher ridge, which rises anteriorly into a blunt cusp. Their crowns are noticeably longer than broad. The sec- ond lower molar closely resembles the anterior lower premolar, except that it lacks the small antero-internal cusp. The skull (figs. 5, 6) very primitive in form, the ventral profile nearly straight, the dorsal pro- file showing no special peculiarities. Floor of brain case scarcely. Fig. 5.—Cynopterus sphinx. Adult female. Mad- ras, India. No. 102430. XU.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readabilit

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