. An introduction to the study of mammals living and extinct. Mammals. Fio. So.—.Ut'50i)?0(?(i)i hiHtRS. From Reinhai'dt. Skull with the region around the nares as in Hyperoodon, except that the nasals are narrow and more sunk between the upper ends of the premaxillre; like those of Hijpcroodon, they are concave in the middle line in front and above. Xo maxillary tuberosities. Anteorbital notch not very distinct. Eostrum long, narrow, and solid throuffhout. Mesethmoid in adult a2;e ossified in its entire. Fu^. S(3.—Left Literal view of skull of Mc^oplodon densirostris. length, coalescing with
. An introduction to the study of mammals living and extinct. Mammals. Fio. So.—.Ut'50i)?0(?(i)i hiHtRS. From Reinhai'dt. Skull with the region around the nares as in Hyperoodon, except that the nasals are narrow and more sunk between the upper ends of the premaxillre; like those of Hijpcroodon, they are concave in the middle line in front and above. Xo maxillary tuberosities. Anteorbital notch not very distinct. Eostrum long, narrow, and solid throuffhout. Mesethmoid in adult a2;e ossified in its entire. Fu^. S(3.—Left Literal view of skull of Mc^oplodon densirostris. length, coalescing with the surrounding bones, and showing as a narrow band on the upper surface of the rostrum. Yertebraj: C 7, D 10, L 10 or 11, C 19 or 20; total 46 to 48. Two or three anterior cervicals united, the rest usually free. Though varying in form, the mandibular teeth of the difterent members of this genus agree in their essential structm-e, having a small and pointed enamel-covered crown, composed of true dentine, which, instead of surmounting a root of the ordinary character, is raised upon a solid mass of osteodentine. The continuous growth of this greatly alters the form and general appearance of the organ as aijo ailvances, as seen most strikingly in the case of M. lai/ardi, where the long, narrow, flat, strap-like teeth, cvu-ving inwards at their extremities, actually meet over the rostrum, and must greatly interfere with the movements of the jaw. In one species (J/, iirai/i) a row of minute, conical, pointed teeth, like those of ordinai-y Dolphins, 17 to 19 in number, are present even in the adults, on. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Flower, William Henry, 1831-1899; Lydekker, Richard, 1849-1915. London, A. and C. Black
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Keywords: ., bookauthorly, bookcentury1800, bookdecade1890, booksubjectmammals
