Cimolopteryx, Marsh, 1889

Marsh, O. C., 1892, Notes on Mesozoic vertebrate fossils, American Journal of Science 260, pp. 171-176 : 175

Cimolopteryx, Marsh, 1889 .

The only bird hitherto known from the Laramie deposits is Cimolopteryx rarus , the type specimen of which is represented on Plate III, figure 2 . Another species, about twice the size of the first, is indicated by various remains, among them the coracoid.^ This bone lacks the strong inner process near the pit for the scapula, which is characteristic' of the smaller form. The present species, which may be called Cimolopteryx retusus , is also from Wyoming.

The new Laramie fossils here described and figured were collected by Mr. J. B. Hatcher and party, in the Ceratops beds of Montana and Wyoming. They will all be discussed more fully in another communication.

Figures

Plate III. Figure 1.—Sternal bone of Claosaurus annectens. One-eighth natural size. a, seen from above; b, seen from below. Figure 2.—Left coracoid of Cimolopteryx rarus, Marsh. Natural size, a, front view; b, inuer view; c, back view; cl, lower eud. Figure 3.—Tooth of Palaeoscincus latus, Marsh, a, natural size; b, c, d, twice natural size. Figure 4.—Tooth of Aublysodon mirandus, Leidy. Natural size, a, front view, with sections; b, side view. (After Leidy.) Figure 5.—Tooth of Aublysodon amplus, Marsh. Natural size, a, side view; b, back view; c, front view. Figure 6.—Tooth of Aublysodon cristatus, Marsh. Twice natural size, a, side view; b, back view; c, front view .