. 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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Keywords: ., bookcentury1800, bookdecade1880, booksub, booksubjectpaleontology