DINOCEEATA. 575 



nasals, for the common suture of these bones extends V-shaped back- 

 ward, to a point opposite to the middle of the zygomatic arches. It gives 

 to the nasals an extent equal to that of the frontals and parietals combined. 

 They not only support the anterior shovels, but form the inner half of the 

 median horn-cores, rising as high as the tuberosity above described. The 

 immense length of the snout in Loxolophodon looks as though the nasal 

 bones had extended themselves forward, so as to ossify the basal portions 

 of an elephantine proboscis. 



The frontals descend behind the horns, with a very obtuse or rounded 

 continuation, to the inner side of the fossa, and without any superciliary 

 margin. They form with the posterior part of the nasals a shallow median 

 basin. The suture with the parietals is very indistinct, but if I have truly 

 discovered it, it forms another posteriorly directed chevron, and leaves but 

 a narrow superciliary portion of the frontals. Above the postglenoid pro- 

 cesses the parietals rise again to the transverse occipital crest, but to what 

 height is uncertain. At the mastoid region, the cranium widens a little, 

 and is excavated at the sides by the temporal fossae. Near where the lateral 

 and supraoccipital crests join the inferior ridge-like border of the temporal 

 fossa, which position is occupied by a knob in E. furcatus, is a strong horn- 

 core with subcylindric base. It stands obliquely backward toward the 

 junction of the posterior squamosal and transverse crests, and is connected 

 to these by an oblique ridge, one side of which is marked with irregular, 

 short, longitudinal rugosities. At the base of these elevations are three 

 sinuses. This portion was found close to the skull, but separated from it, 

 and the loss of intervening fragments prevents actual fit. 



The occiput is preserved for four inches above the condyles ; it 

 doubtless displayed a posteriorly sloping transverse crest as in U. furcatus. 

 The paroccipital and mastoid tuberosities are narrowed and extend 

 obliquely downward and forward. The lower part of the exoccipital 

 suture runs along a ridge, and there is a tuberosity in front of the mastoid 

 foramen. An irregular ^-shaped crest extends upward with the apex at 

 the inferior temporal crest, and its anterior limb forms part of the poste- 

 rior boundary of the meatus auditorius. The inferior temporal crest is 

 directed outward below, but forward above. 



