The heavy line on the left of the drawing ([fig. 24, B]) represents the outline of the preserved portion. The skull, as restored, may be a little too long, and the shape of the horns is conjectural. In the orbit there are preserved 2 misplaced teeth showing longitudinal fluting. The longest tooth is about 3 mm.
| Measurements of the Type Skull of Diceratosaurus robustus Moodie. | |
| mm. | |
| Median length of skull, estimated | 67 |
| Posterior width of skull, estimated | 78 |
| Length of orbit | 18 |
| Width of orbit | 12 |
| Length of longest tooth | 3 |
| Width of same tooth at base | 1.5 |
| Length of postorbital | 27 |
| Width of postorbital | 14 |
Genus EOSERPETON Moodie, 1909.
Moodie, Jour. Geol., XVII, pp. 76-79, fig. 20, 1909.
Moodie, Bull. Am. Mus. Nat. Hist., XXVI, p. 355, pl. lxiii, fig. 1, 1909.
Type: Eoserpeton tenuicorne Cope.
The genus was proposed for the reception of a single species originally referred by Cope to Ceraterpeton (C. tenuicorne). The species can not be placed in the genus Ceraterpeton on account of the form and structure of the skull, which varies widely from that of the type species, Ceraterpeton galvani Huxley, from the Kilkenny Coal Measures of Ireland. The most important character in which the present species differs from C. galvani is the peculiar form taken by the squamosal and by the position of the "horn." These characters will be evident on referring to [figure 25]. No undoubted remains of Ceraterpeton have been found outside the British Isles. Fritsch referred ([251]) a species, previously described as Scincosaurus crassus, to this genus, but Andrews ([8]), Jaekel ([347]) and Woodward ([630]) all unite in placing the species in the genus where it was formerly described. Jaekel even says that the Scincosaurus has no horns, so far as he can determine. Cope referred 3 species ([123]) from the Linton Coal Measures of Ohio to the genus Ceraterpeton, but it has been shown elsewhere ([347]) that no one of them belongs in the genus, nor in fact do they all belong in one genus.
Eoserpeton tenuicorne Cope.
Cope, Geol. Surv. Ohio, II, pt. II, pp. 372-373, pl. xlii, fig. 2, 1875.