AND AYES OF NORTH AMERICA. 59 BELODON CAROLINENSIS, Emmons, Cope. Proceed. Ae. Nat. Sci., 1866, 240. Banana (Rkylidodon) earolioensis Enunons* N. Amer. Geology, p. Geol. Surv. North Carolina. Palaeos«urus :I:dating, Emmons loc. cit. (posterior maxillary teeth), Fig. Emmons Manual of Geology, p. 179. Centemodon Meatus, Lea. Proceed Ac. Nat. Sei., Phila, 1836, 78. Cope, 1868. 221. ?Omosaurus perplexes, Leidy, Proceed. Ac. Sci., Phil., 1836, 236. This reptile I find on examination of the type specimen to belong here. Teeth of the same are in Wheatley-'s eollectiou at Phamixville. I do not consider that any ground of specific distinction between this auhnal and the C. sulcatus has been pointed out, but leave the discussion of the relations of these Triassie forms for a future essay. Lea has called my attention to the fact that through some error in reading the scale, the measurements of the type tooth published are double the coneet ones. The specimen consist of the distal half of a slightly curved eonic tooth, and does not display any pulp cavity; the allusion to this in the original description having reference to frac-ture. The tooth cannot be called sulcate, but is rather weakly ridged or fluted. The original description may-therefore be amended to read thus: Tooth slightly curved, with low trenchant edges, rounded on the exposed face, openly fluted on the lower (median) portion near the fracture, covered with very minute distinct strife from the point to the base, which stria cross to the flutings in oblique lines. Length, eight-twentieths of an inch ; greatest breadth, two-twentieths; pulp cavity minute or none. The enamel of the teeth of B. carolinensis is rarely preserved; when this is the ease its stria, fluting, etc.. are as ascribed in C. sulcatus. Coal Measures of the Reaper Trigs. Chatham Co., N. Carolina. BELODON PRISCUS, Leidy. Palazosaurus earolinensis, Emmons. Geological Survey N. Ca., 1836, p. SO. N. Amer. Geology, 1837, 86, figs. 37-9 CO. nee lihytidodon earolinensis supra. ?Contpsosaurus prisms, Leidy, Proc. Acad. Nat. Sci., Phila., 1850, 165. Clensaurus pennsyleanicus, "Lea." Emmons in pane, Geol. Survey N. Carolina, 1856; North Amer. Geology, 1857. pp. 67-71-3; figs. 37 to 50 nee Leaii. Represented by numerous specimens from the Triassic of Chatham and Montgomery counties, N. Carolina. Teeth not fluted; caudal vertebra with articular faces broad as long, and centrum little compressed. Size medium. BELODON LEAH, B172711011S. Clepsisaurus leaii, Emmons. Geol. Surrey N. Ca., 1856; N. Amer. Geology. 1857. p. 79, fig. 51, Pl. 8, figs. 1-4. Emmons states that this species is smaller than the last, and that the centrum is longer than broad. Cervical vertebra short, compressed, extremities strongly concave. The Trias of Dan River, N. Carolina. BELODON LEPTURUS, Cope. Spec. nov. Represented by wholes or parts of fourteen vertebra; a left femur and fibula; a phalange; imperfect ilium and isehium attaehed; with numerous ribs and dermal bones, from several bloeks of bituminous shale from the bone bed iu the tunnel at Phcenixville, Penna. The fragments indicate the largest species of the genus, one of the vertebra with spine, measuring eight inches in total elevation. The eentra of the dorsals are wider at the articular faces than long; in the other two species the length is greater than or equal to the width. The caudal vertebra are much compressed, not subeylindric as in B. prisms. The femur restored measures thirteen inches in length. Ischium sending a process forwards bounding the aeetabulum below in part, largely excavated by the obturator foramen, which is very externally situated. The bones were enclosed in five slabs of black, bituminous argillaceous rock of the Phoenixville section. and they were taken out from the same immediate proximity by the workmen engaged in the work in the tunnel. One slab contained three dorsal and two eaudal vertebra with chevron bone. The second, one and part of another dorsal ver-
