1. Type of Leptophractus lineolatus Cope, from the Coal Measures of Linton, Ohio. Portions of maxilla and mandible of left side with teeth. × 1. Original in American Museum of Natural History.
2. Type of Proterpeton gurleyi Moodie, from the Coal Measures of Illinois, near Danville. Cervical of an otherwise unknown vertebrate. Neural spine to the right. Original in Walker Museum, University of Chicago × 2.
3. Amphibian phalanx from the Coal Measures near Breeze, Illinois, of an unknown species. The probable form of the element is represented. × 3.
4. Large rib of a stereospondylous stegocephalan otherwise unknown. The rib may represent a species of Macrerpeton or may even belong with Macrerpeton deani Moodie, but exact identification will have to wait for future discoveries. From the Coal Measures of Linton, Ohio. Original in U. S. National Museum. × 1.
5. Type of Cope's species Tuditanus mordax referred by him to the cranium, on account of the sculpturing of the elements. We now know the specimen to be portions of the interclavicle and clavicles of Diceratosaurus punctolineatus, as Cope suggested they might be. Original in American Museum of Natural History. × 1.
6. Skull of Baphetes planiceps Owen from the Coal Measures of Nova Scotia. × 0.45. Original in the British Museum. South Kensington. After Owen.
This species may be distinguished from other members of the genus by the large size and shape of the cranium ([462]) and the broad mandible ([plate 16, figs. 2, 3]) with its very long teeth. The skull of Sauropleura digitata Cope is not known, but the body of that animal as preserved represents far too small a form for the skull to be referred to that species. The skull is fully half as long as the dorsal region of S. digitata Cope, so that an association of the remains would be incongruous. It differs from the skull of S. scutellata Newberry in size and proportions. The skull of S. scutellata is narrow, while in S. longidentata it is quite broad. The teeth of the latter are also characteristic of the species, since in all other known species of this genus in which the skull is preserved the large anterior tooth is wanting.