. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. On some New Therapsid Genera. 75 Hipposaurus boonstrai gen. et sp. nov. This new and very striking form was found on a recent collecting expedition by Mr. L. D. Boonstra at Klein Koedoeskop, in the Division of Beaufort West, at a fairly high horizon in the Tapinocephalus zone (S. Afr. Mus. Cat. No. 8950). The type consists of an almost complete skeleton, but hitherto only the skull and lower jaw have been partially cleared from the highly intractable matrix. It is proposed to give a description of th
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. On some New Therapsid Genera. 75 Hipposaurus boonstrai gen. et sp. nov. This new and very striking form was found on a recent collecting expedition by Mr. L. D. Boonstra at Klein Koedoeskop, in the Division of Beaufort West, at a fairly high horizon in the Tapinocephalus zone (S. Afr. Mus. Cat. No. 8950). The type consists of an almost complete skeleton, but hitherto only the skull and lower jaw have been partially cleared from the highly intractable matrix. It is proposed to give a description of the whole skeleton at a future Fig. ]8. -Lateral view of type skull of Hipposaurus boonstrai gen. et sp. nov. The skull is of somewhat remarkable shape. The snout is long, narrow, and deep, the depth increasing regularly from the anterior end to the plane of the antorbital border. The sides of the snout are nearly vertical, and they pass by a fairly sharp curve into the narrow, slightly convex, upper surface. Immediately in front of the orbit the sides are widely excavate into a basin-like depression whose contain- ing wall is very thin. This depression was probably overhung by a preorbital ridge. At about the plane of the middle of the orbits the top surface of the skull is bent, so that the top of the skull makes an obtuse angle with the top of the snout. There are well-marked supraorbital crests, between which and the central ridge the frontals are broadly concave. In their posterior part this concavity is continued as a well-defined irregular groove which extends back to the level of the pineal Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original South African Museum. Cape Town : The Museum
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
