On Oudenodon (Aulacocephalus) pithecops from Cape Colony / by H.G. Seeley.

  • Seeley, H. G. (Harry Govier), 1839-1909.
Date:
1898
Catalogue details

Licence: Public Domain Mark

Credit: On Oudenodon (Aulacocephalus) pithecops from Cape Colony / by H.G. Seeley. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    0. prognathus by wanting tbe anterior angle to the eye. It is separated from 0. Greyi by tbe same characters, as well as by wanting the large anterior nares of that species, and by having the temporal vacuities elongated from front to back. It has a relatively longer nose than 0. megalops, has not the eyes so far forward as in 0. Baini or 0. breoirostris ; and the skull is much narrower than in the East London species 0. raniceps and differs in its proportions, being of thin and delicate build, while 0. raniceps has the bones relatively strong. Oudenodon (Aulacoccphalus) pithccops, Seeley, sp. nov. From the Dicynodont Beds of East London, Cape Colony. Restored from [R. 1819]. Preserved in the Brit. Mus. Nat. Hist. % less than natural size. The skull is depressed, about twice as wide as high, and measured transversely in front of the orbits, it is half as wide as long. The preorbital region forms nearly an equilateral triangle, conical, rounded from above downward and from side to side. Towards the extremity of the snout, on each side there is a longitudinal depression, extending from the orbits forward to the nares. Those openings were small, and at present are obscured with matrix. The orbits almost suggest the eyes of a lemur in their large circular form ; their chief direction is upward and outward. The interspace which divides them is about one-third the diameter of an orbit. The maxillary border extends back as far as the front of the orbit, below which it is notched out and gives plane to the malar bar, which contracts a little behind the orbit from above. In side view it is prolonged back parallel to the alveolar margin, uniting in the usual way with the squamosal, and with the vertical bar of the postfrontal bone which descends behind the orbit. The external squamosal element of the zygoma is inclined obliquely outward, and as it extends backward becomes deeper by ascending. Its upper edge is on a level with the base of the orbit in the malar portion at the back of the orbit, but the concave upper outline of I the zygoma is on a level with the middle of the orbit, where the