2681 — 1 . 5 . 16 — 600 . 
ANNALS OF THE TRANSVAAL MUSEUM. 
Supplement No. 3 to Vol. V, No. 3. 
A NEW KARROO REPTILE. 
By Dr. E. C. N. van Hoepen, M.I. 
DIN OCEPHALI A. 
Jonkeria truculenta gen. et sp. n. 
A few months ago the Museum expedition to the Karroo found on the 
farm Abrahamskraal, Prince Albert District, the remains of a large reptile. 
The whole farm is situated on Lower Karroo Beds, and of these probably 
only the Pariasaurus zone is present. The locality of the remains in 
question is situated near the southern border of the farm, and belongs 
without doubt to the Pariasaurus zone. The remains consist of the skull, 
with the greater part of the postcranial skeleton. The skull has now 
been sufficiently cleared of its matrix to allow of a preliminary description 
and to show that the reptile is undoubtedly a Dinocephalian. 
The skull is long and narrow, but below and behind the orbits it 
broadens considerably. The orbits are large and of about the same size 
as the temporal vacuities. There is no pronounced thickening of the 
upper and hinder rim of the orbit. The nostrils are far in front and 
lateral. The parietal foramen is situated at the extreme end of the upper 
surface of the skull and on the top of a broad and high boss. There are 
large teeth in the front end of the jaw. Some of these are very probably 
on the maxillaries. They are typically Dinoce'phalian , having a high 
sharp-edged anterior cusp and a broad flat posterior cusp. Behind these 
large teeth on the maxillary follows a row of small molars, the crowns 
of which are flattened and serrated in front and behind. 
Length of the skull from snout end to hinder end of the con- 
dylus occipitalis 53 cm. 
Distance from front end of nostril to tip of snout 8 cm. 
Distance from front end of orbit to tip of snout 33 cm. 
Breadth between the nostrils 4 cm. 
Breadth between the orbits 10 cm. 
Length of the parietal foramen 2 cm. 
