. The coal measures Amphibia of North America. Amphibians, Fossil; Paleontology; Paleontology. 1S4 THE COAL MEASURES AMPHIBIA OF NORTH AMERICA. DESCRIPTION OF ADDITIONAL MATERIAL OF MACRERPETON HUXLEYI. The additional material of this species which has come to hand consists of an almost complete skull (American Museum No. 2933, two portions); another frag- mentary skull (American Museum No. 8572 G and 8532 G); a portion of an interclavicle (American Museum No. 8006); two incomplete vertebrae (American Museum No. 8007); and another fragmentary element possibly representing a scapula of this spe
. The coal measures Amphibia of North America. Amphibians, Fossil; Paleontology; Paleontology. 1S4 THE COAL MEASURES AMPHIBIA OF NORTH AMERICA. DESCRIPTION OF ADDITIONAL MATERIAL OF MACRERPETON HUXLEYI. The additional material of this species which has come to hand consists of an almost complete skull (American Museum No. 2933, two portions); another frag- mentary skull (American Museum No. 8572 G and 8532 G); a portion of an interclavicle (American Museum No. 8006); two incomplete vertebrae (American Museum No. 8007); and another fragmentary element possibly representing a scapula of this species (American Museum No. 8008). The skull has essentially the shape outlined (462) from a study of the fragmen- tary type specimen. The muzzle was drawn slightly too broad, but otherwise the restoration is fairly accurate. The specimen is distorted and imperfect, but enough is preserved to give a good idea of the shape and something of the structure of the skull. A portion of the obverse is preserved. The back part of the skull is broken, so that the occiput can not be studied. The length of the skull is one and two-fifths the greatest breadth (across the orbits). The cranial elements are deeply marked with pits and short, shallow grooves. On the left mandible these pits are in a very distinct row, the operculo- mandibular lateral line. Macrerpeton deani new species. Type: Specimen No. 2934, American Museum of Natural History. Horizon and locality: Linton, Ohio, Coal Measures. (Plate 21, figs. 1, 2.) The material for this species consists of the posterior half of the left mandible and a portion of the right antero-lateral surface of the skull, both incomplete. The reasons for regarding the species as distinct are the large size of the specimens and the manner of the sculpture, as well as the shape of the posterior end of the mandible. The present species is the largest amphibian of the Linton, ()hio, Coal Measures, exceeding in skull length that of Macrer- \-n,. 4 peton huxley
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