. FiGUKE 114.—Kight lunar of Dinoceras rairabile, ilarsli (No. 12:;0); front view. FiGDUB 115.—Left lunar of Tiiioceras ingens, Marsh (No. 1504); bottom vieTi'. FiGUEE 116.—Left luuar of Tinoceras ingens (No. 1219); front view. m. face for magnum; p. face for pyramidal; r. face for radius; •?. face for scaphoid; <r. face for trapezoid; un. face for unciform. All the figures are one-half natural size. The distal surface (figure 12) is divided into two articular faces, supporting in part the mag-num and the unciform. These faces are confluent, and sometimes hardly to be distinguished in front

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. FiGUKE 114.—Kight lunar of Dinoceras rairabile, ilarsli (No. 12:;0); front view. FiGDUB 115.—Left lunar of Tiiioceras ingens, Marsh (No. 1504); bottom vieTi'. FiGUEE 116.—Left luuar of Tinoceras ingens (No. 1219); front view. m. face for magnum; p. face for pyramidal; r. face for radius; •?. face for scaphoid; <r. face for trapezoid; un. face for unciform. All the figures are one-half natural size. The distal surface (figure 12) is divided into two articular faces, supporting in part the mag-num and the unciform. These faces are confluent, and sometimes hardly to be distinguished in front, but, on the posterior part of the surface, they are separated by a more or less distinct rounded ridge. Both these faces are nearly flat transversely in front, and somewhat concave behind. In an antero-posterior direction, they are convex in front, and behind, u

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Keywords: ., bookcentury1800, bookdecade1880, booksub, booksubjectpaleontology