The interclavicle is diamond-Shaped, with surface punctate and edges radiately grooved at a distance of 1.5 mm. from the edge. The hand on the right side of the specimen contains 3, 3, 3, 6, 3 phalanges. The vertebræ are all imperfectly preserved. Other specimens of this species are 2567 (48), 8376 G, 8704 G, American Museum of Natural History. Coal Measures of Linton, Ohio. Collected by Dr. J. S. Newberry. =Sauropleura newberryi Cope.= Cope, Geol. Surv. Ohio, II, pt. II, p. 404, pl. xxxvii, figs. 2 and 3; pl. xli, fig. 5, 1875. Type: Specimen No. 8612 G, American Museum of Natural History. Horizon and locality: Linton, Ohio, Coal Measures. The type specimen of the species exhibits a portion of the posterior part of the skull, a considerable part of the body, with the fore limbs and abdominal scutellæ. No vertebræ can be definitely discovered and the ribs are not distinctly visible. The cranial fragment is the upper surface of the tabulare and adjacent elements, and a broad band of the posterior parts of these is seen to be smooth, and is preceded by a slightly roughened surface. The abdominal scutæ are diamond-shaped, and are thin and light, not massive, as in _S. scutellata_, and are sometimes marked with a median longitudinal keel. The fore limb is large, especially the humerus, which is much dilated distally, and has a strong crest on the outer side from near the proximal end. The ulna and radius are much shorter, and more dilated proximally than distally; they are well separated. No phalanges are preserved. The species is represented by other specimens, all of which are unsatisfactory in determining the structure of the form. A skull, apparently complete, is crushed out flat, so that little can be said of structure. The teeth are rather long, straight, acute, and striate at the base. The orbits are long and narrowed in front. Measurements of Sauropleura newberryi Cope. (No. 8612 G, and two unnumbered specimens, American Museum of Natural History.) mm. Length of humerus 35 Proximal width of humerus 8 Distal width of humerus 14 Length of ulna 19 Proximal width of ulna 8 Posterior width of skull 67 Width at anterior angle of orbits 40 Interorbital space 13 Width of orbit 13 Length of orbit 27 Length of a maxillary tooth 4 Diameter of same at base 2 =Sauropleura pauciradiata Cope.= Cope, Trans. Am. Phil. Soc., XV, p. 275, 1874. Cope, Geol. Surv. Ohio, II, pt. II, p. 408, pl. xl, figs. 1-2, 1875. Type: Specimen No. 8671 G, and obverse, American Museum of Natural History. Horizon and locality: Linton, Ohio, Coal Measures.