On the os pubis of Polacanthus foxii / by H.G. Seeley.

  • Harry Govier Seeley
Date:
1892
Catalogue details

Licence: Public Domain Mark

Credit: On the os pubis of Polacanthus foxii / 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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    Polacanthus Fo.vii, and shows that the Wealden fauna contained more than one type of heavily-armoured Saurian. It is not improbable that the dermal bone figured 1 from Gosau, which was referred to Oratceomus, and compared in form to the horn core of an ox, may be the horn upon the frontal bone. If so, it establishes a striking difference between that genus and Strulhio- saui'us, which has a small skull, without anything to indicate supra- orbital horns such as have been suggested for Oratceomus. Cope has compared it to Monoclonius of the horn of Agathaumus,2 and Marsh to the horn of Triceratops.3 On this comparison Zittel * has placed Oratceomus in the suggested sub-order Ceratopsia. The bone may possibly be a link of alliance between Agathaumus and Oratceomus. But I do not discover evidence of stronger affinity between those genera than is manifest between Oratceomus and Polacanthus, or between Polacanthus and Omosaurus. So that l am led to associate all those genera in near alliance, in the Scelidosaurian division of the order Ornithischia. [iVote.—The pubis of Polacanthus has been freed from the matrix by Mr. Richard Hall, since this paper was read.—December 31, 1891.] 1 Op. cit. pi. xxviii. fig. 4. 2 E. D. Cope suggested this identification to me in 1886. 3 Geol. Mag. for 1889, p. 207; ibid, for 1891, p. 193. 1 1 Handb. der Palasontol.’ Band iii. Abth. i. p. 753.
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