Fig. 42.
A. Outer view of mandible of Eobaphetes kansensis Moodie, from the Coal Measures of Washington County, Kansas. Original in U. S. National Museum. × 0.33. Cat. No. 6680. a, angular; r, articular; d, dentary.
B. Portion of skull of Eobaphetes kansensis Moodie, from the Coal Measures of Washington County, Kansas. Original in U. S. National Museum. Cat. No. 6699. × 0.33. Lateral-line canal represented by heavy broken line, n, nasal; m, maxilla.
C. Inner surface of mandible of Eobaphetes kansensis Moodie, from the Coal Measures of Washington County, Kansas. × 0.33. a, angular; p, prearticular; r, articular; s, splenial.
The markings of the inner surface are as indicated in the drawing. The back portion of the angular shows a few radiating lines. The dentary is roughened in two portions: one near the teeth, the other at the tip, where there is a cartilaginous roughening for union with its mate. The remainder of the inner surface is relatively smooth.
The outer surface shows at the anterior end the typical labyrinthodont sculpturing, which becomes slight grooves and ridges posteriorly. I detect evidences of the operculo-mandibular lateral-line canal throughout the entire length of the mandible. Its location is indicated by the heavy broken line. The suture between the dentary and angular is quite clear. The suture separating the dentary and splenial joins the angular suture about midway of the length of the jaw.
| Measurements of Skull Fragment of Eobaphetes kansensis Moodie. (Cat. No. 6699, U. S. Nat. Mus.) | |
| mm. | |
| Total length of portion preserved | 109 |
| Maximum width of maxilla | 45 |
| Thickness of maxilla | 7 |
| Length of tooth | 10 |
| Width of tooth at base | 4 |
| Measurements of Left Ramus of Mandible of Eobaphetes kansensis Moodie. (Cat. No. 6680, U. S. Nat. Mas.) | |
| mm. | |
| Total length of jaw, as preserved | 305 |
| Greatest width | 79 |
| Least width | 24 |
| Length of angular | 132 |
| Width of angular | 45 |
| Length of largest tooth | 10 |
| Width of largest tooth at base | 6 |
| Length of most posterior tooth | 6 |
| Width of most posterior tooth at base | 4 |
| Length of anterior internal mandibular foramen | 56 |
| Greatest width | 15 |
| Least width | 7 |
| Length of posterior internal mandibular foramen | 77 |
| Greatest width | 28 |
| Least width | 14 |
| Length of bridge | 16 |
| Width of bridge | 8 |
Ribs.—There are portions of two dorsal ribs preserved on the block of coal with the skull. These show characters very similar to those exhibited by the rib ascribed to Macrerpeton huxleyi Cope, and also those of Metoposaurus diagnosticus von Meyer ([242]) and Anaschisma. The ribs are solid, heavy, curved, and have a longitudinal groove on the middle of each side. The heads of the ribs in the present specimen are obscured and nothing can be said of them except that they appear to be large.