AND AVES OF NORTH AMERICA. 



59 



BELODON CAROLINENSIS, Emmons, Cope. 



Proceed. Ac. Nat. Soi., 1800, 249. Ruliodon (Bhylidodon) carolinensis Emmons' N. Amcv. Geology, p. 82. 

 Geol. 8urv. North Carolina. Palaeosaurus sulcatus, Emmons loo. cit. (posterior maxillary teeth), Fig. Emmons 

 Manual of Geology, p. 179. Centemodon sulcatus, Lea. Proceed Ac. Nat. Sci., Phila, 1850, 78. Cope, 1808, 221. 

 t Omosaurus perplexus, Leidy, Proceed. Ac. N. Soi., Phil., 1850, 250. 



This reptile I Snd on examination of the type specimen to belong here. Teeth of the same are in Wheatley's 

 collection at Phoenix ville. I do not consider that any ground of specific distinction between this animal and the C. 

 sulcatus has been pointed out, hut leave Hie discussion of the relations of these Triassic forms for a future essay. 



Lea has called my attention to the fact that through some error in reading (he scale, the measurements of the 

 type tooth published are double the correct ones. The specimen consist of the distal hall' of a slightly curved conic 

 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 tinted on the lower 

 (median) portion near the fracture, covered with very minute distinct strife from the point to the base, which strise 

 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 11. carolinensis is rarely preserved; when this is the case its stria!, fluting, etc., are 

 as ascribed in O. sulcatus. 



Coal Measures of the Keuper Trias. Chatham Co., N. Carolina. 



BELODON PRISCUS, Leidy. 



Falieosaurus carolinensis, Emmons, Geological Survey N. Ca., 1850, p. 80. N. Ainer. Geology, 1857, 80, figs. 57-8 

 00. nee Bhytidodon carolinensis supra, f Oompsosaurus priscus, Leidy, Proc. Acad. Nat. Sci., Phila., 1856, 105. 

 Clepsysaurus pennsylvanicus, "Lea," Emmons in parte, Geol. Survey N. Carolina, 1850; North Amor. Geology, 1857, 

 pp. 67-71-8; ligs. 87 to 50 nee Leah. 



Represented by numerous specimens from the Triassic of Chatham and Montgomery count ies, N. Carolina. Teeth 

 not fluted; caudal vertebras with articular faces broad as long, and centrum little compressed. Size medium. 



BELODON LEAH, Emmons. 



Clepsisaurus leaii, Emmons, Geol. Survey N. Ca., 1850; 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 Han River, N. Carolina. 



BELODON LEPTURUS, Cope. 



Spec. nov. 



Represented by wholes or parts of fourteen vertebras; a left femur and fibula; a phalange; imperfect ilium and 

 ischium attached; with numerous ribs and dermal bones, from several blocks of bituminous shale from the bone bed in 

 the funnel at Phoanixville, Penna, 



The fragments indicate the largest species of the genus, one of the vertebra) with spine, measuring eight inches 

 in total elevation. The centra 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 vertebree arc much compressed, not suboylindrio as in B. 

 priscus. The femur restored measures thirteen inches in length. Ischium sending a process forwards bounding the 

 acetabulum 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 Phoanixville section, ami 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 caudal vertebree with chevron bono. Tho second, one and part of another dorsal ver- 



