Archive image from page 157 of Dinocerata a monograph of Dinocerata : a monograph of an extinct order of gigantic mammals dinoceratamonogr00mars Year: 1886 134 DINOCERATA. The most marked charactev of these bones in the Dlnocerata is that they are flat and horizontal, as in the Artiodactjds, and not vertical, as in the Proboscidians, and the Perissodactyls. The first bone of the series, or the pre-sternum, is compressed, pointed in front, and, at this end, has two distinct facets for the first pair of ribs. This bone is shown in Plate XL, figu]-es 1, 2, and 3. Tlie bones which' follow, and
Archive image from page 157 of Dinocerata a monograph of Dinocerata : a monograph of an extinct order of gigantic mammals dinoceratamonogr00mars Year: 1886 134 DINOCERATA. The most marked charactev of these bones in the Dlnocerata is that they are flat and horizontal, as in the Artiodactjds, and not vertical, as in the Proboscidians, and the Perissodactyls. The first bone of the series, or the pre-sternum, is compressed, pointed in front, and, at this end, has two distinct facets for the first pair of ribs. This bone is shown in Plate XL, figu]-es 1, 2, and 3. Tlie bones which' follow, and compose the meso-sternum, are broad and flat, somewhat constricted near the middle, with the ends more or less convex. The anterior ends are usually strongly convex, while the posterior exti'emities may be nearly flat. Two examples of these median sternal bones are shown in the same Plate, figures 4-9, as well as in the woodcut below. Figure 133.—Sternum of Dinoceras mirahile, Mnrsb; top view. One-fifth natural size. The last sternal bone of the series, or tlie xiphi-sternum, is also broad and flat, but has tlie posterior extremity pointed. This bone is shown in figures 10-12, of the same Plate. The surface of all the sternal bones is quite i-ugose, and tlie extremities are deeply pitted for union with tlie cartilage that held them in position. No indication of clavicles lias been observed.
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