ontal on K. U. no. 788. The smallest is anterior; the margins of all
are nearly straight. The bones are unornamented. Each bears a pore of
the supraorbital line just below the midline. The supraorbitals of _R.
elegans_ have a triangular outline and do not bear pores.

Intertemporals (fig. 3) on several specimens vary from approximately 9.0
to 15.0 mm. in length, 2.0 to 2.7 mm. in anterior width, and increase to
4.5 to 8.0 mm. in maximum posterior width. The midline suture is
straight, the anterior margin is concave and the lateral margin proceeds
laterally in a concave curve to the widest portion. In _R. elegans_ only
the anterior half of the corresponding margin is concave. The posterior
margin is slightly rounded and slopes anteriorly toward the lateral
margin. Ornamentation is usually of randomly oriented tubercles and
striae, although striae are more common in the posterior third and may
be longitudinal, whereas tubercles occur mainly on the anterior section.
No evidence of sensory pores, as seen on the intertemporal of _R.
elegans_, has been found.

The supratemporals were observed on only one specimen (K. U. no. 788),
(fig. 3). Sutures were difficult to distinguish but the medial margin is
presumed to curve to fit and to articulate with the lateral margins of
the intertemporals. Lateral margins are smoothly curved but the anterior
and posterior margins were broken off. There appears to be no
ornamentation on this bone. The supratemporals are much more elongated
and curving than those in _R. elegans_.

The cheek region is nearly complete in one specimen (K. U. no. 788), and
scattered parts occur in a few others (see fig. 3). The lacrimojugal of
no. 788 is elongate, with both ends curving dorsally. It differs from
the lacrimojugal in _R. elegans_, in which the anterior end extends
anteriorly and is not curved dorsally. The posterior and anterior
margins are not preserved; the greatest height appears to be posterior.
Pores of the suborbital portion of the infraorbital sensory canal are
seen on the dorsal surface of the bone. In _R. elegans_ the pores are on
the lateral surface. A section of the lacrimojugal on specimen no.
11425, broken at both ends, shows a thin layer of bone perforated by the
pores and covering a groove for the canal within the dorsal margin of
the bone. Both specimens are unornamented.

A nearly complete postorbital (fig. 3) on specimen no. 788 is nearly
triangular, with the apex ventral. The c