Cope (Geol. Surv. Ohio, vol. II, pt. II, p. 388, 1875), says: "This genus is indicated by two rami of a mandible and a portion of a premaxillary only. These, when compared with those of _Œstocephalus_ and _Tuditanus_, from the same locality, and with others described by authors, are so much stouter, i.e., shorter and more elevated, that they evidently belong to a genus unlike either. The genus further differs from _Œstocephalus_ in having the teeth of equal size to the posterior part of the series; that is, to the base of the elevated coronoid process. The teeth are elongate cylindrical cones, with their acute tips turned a little posteriorly. The fractured ones display a large pulp cavity. The three premaxillaries preserved are similar, but without curvature at the tips. They do not exhibit striæ or any other sculpture. "So far as the remains known go, the genus is nearer _Hylerpeton_ than any other. According to Dawson, that genus is provided with a large canine-like tooth, at the anterior extremity of the maxillary, on the inner row, which is inserted into a distinct socket. No such tooth appears among those of this genus. The latter does not give any indication of the very elevated coronoid process of _Brachydectes_, though the external portion of the dentary bone in that region being lost, little can be said about it." =Brachydectes newberryi Cope.= Cope, Proc. Phila. Acad. Nat. Sci., p. 214, 1868. Cope, Trans. Am. Phil. Soc., 1868, p. 14. Cope, Geol. Surv. Ohio, II, pt. II, p. 388, pl. xxvii, fig. 2, 1875. Type: Specimen No. 8604 G, American Museum of Natural History. Horizon and locality: Linton Ohio, Coal Measures. Cope (Geol. Surv. Ohio, vol. II, pt II, p. 388, 1875) says of this form: "The species is represented by one nearly perfect ramus mandibuli, one dentary bone and one premaxillary, probably not complete. "The dentary bone appears to have been attached by suture to the articular and angular, as its free margin has very much of the outline of that suture in _Amphiuma_ and lizards. The coronoid process would also seem to be a part of the same bone as in _Amphiuma_ and _Menopema_, and not composed of the coronoid bone as in lizards. It rises immediately behind the last tooth, and displays no suture.