210 
Annals of the Transvaal Museum. 
3. — Owen, R. 
4. — Owen, R. ... 
5. — Owen, E. 
6.— Broom, E. 
7. — Jaekel, 0. 
8. — Watson, D. M. S. ... 
“ On Some Reptilian Fossils from South 
Africa.” Quart. Jonrn. Geol. Soc. 
London, Yol. 16, pp. 49-62, PL 
I - 1 1 1 ; London, 1860. 
“On the Die ij nod on t Reptilia, with a 
description of Some Fossil Remains 
brought by H.R.II. Prince Alfred 
from South Africa, November, 
1860.” Reprint from Phil. Trans. 
1862, pp. 455-462, PI. AIX-XXIL 
(Read 20th February, 1862.) 
“ Descriptive and Illustrated Catalogue 
of the Fossil Rep film of South Africa 
in the Collection of the British 
Museum. ” London, 1876. XII, 88; 
I-LXX. 
On Some Points in the Anatomy of the 
Anomodont Skull.” Rec. Albany 
Mus., Yol. I, Pt. II, pp. 75-82, PL 
IY, fig. 5. Grahamstown. Issued 
18th March, 1904.” 
“ Die T V irbelti ere A Berlin, 1911. 252. 
“ The Skeleton of Lyst/rosaurus. J ’ Rec. 
Alban v Mus., Yol. II, Pt. IY, pp. 
287-295, PL XY, XYI. Grahams- 
town. Issued 26tli March, 1912. 
The Dentary. — The dentaries fuse in the symphysis, of which they 
form the greater and upper part. The fore part of the symphysis is 
convex both vertically and transversely, and shows two parallel, longi- 
tudinal grooves (fig. 3). These grooves divide the symphysis in three 
parts, which end upwards, according to Huxley, in three projections, 
fitting into the grooves on the palatal surface of the premaxillary 
(see p. 1). This, however, could not be confirmed, as the extreme end 
of the symphysis in our specimen is damaged. The inner surface of 
the symphysis forms a deep, longitudinal groove, slightly inclining 
backwards between the upper borders of the rami of the jaw. This 
surface bends down vertically where the rami part from each other to 
diverge backwards. It then shows in its upper part a narrow pit, of 
which the axis is directed forwards, and below this a much broader 
excavation, formed by the opprcular elements, the axis of which is 
also directed forwards (figs. 2 and 17). The suture of the opercular 
elements with the upper bones enters into the upper pit. 
The dentaries have broad upper borders, which form the sides of 
the symphysial g’roove. These borders are thickest at the back end of 
the symphysis (figs. 14, 16, 17) ; they become only slightly thinner 
forwards, but gradually diminish to half this thickness from this point 
backwards. Two ridges extend longitudinally parallel over the whole 
length of the border (fig. 16). The inner ridge is well developed in 
front, but diminishes gradually in height backwards until it reaches 
the greatest thickness of the border; the height increases from this 
point backwards. The hind part of this ridge passes on to the comple- 
mentary element, The front end of the outer ridge is merely an acute 
