Further observations on Pareiasaurus / by H.G. Seeley.

  • Harry Govier Seeley
Date:
1892
Catalogue details

Licence: Public Domain Mark

Credit: Further observations on Pareiasaurus / 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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    which is rounded. It is prolonged as a slightly concave cartilaginous surface along about 5 inches of the downwardly reflected external crest, which is from 1 inch to inch thick where the cartilage surface ends. The bone then becomes more compressed and rounded from side to side. In the crushed specimen from the right side, the extreme transverse width of tlie proximal end is 10 inches ; the least width in the lower third of the shaft is 5^ inches ; the maximum width of the distal end, as preserved, is 7^ inches. From the evidence of the uncrushed left femur, these measure- ments are in excess of the true proportions, and due to distortion of the bone. The Fia-. 8. Fig. 9. Imperfect eft femur of P. Baini with the restored parts indicated by dotted lines. Fig. 8.—The superior aspect shows p the proximal ai’ticulation (restored) ; / a foramen which passes between the condyles. Fig. 9.—The inferior aspect of the left femur, showing t the internal proximal trochanter which defines a basin on the head of the bone; /, inter-condylar foramen; c, distal condyle. superior surface on the left side forms an arch from side to side, which on the right femur is flattened. On or about the summit of the arch is a large rough ovate tubercle, about 3| inches from the proximal end of the bone (fig. 8). This tubercle has a rugous surface, is 2f inches long, 2^ inches wide.* There was something approaching to a rounded median longitudinal ridge on the sujjerior surface of the bone, as in the femur of a Pareiasaurian originally termed Propappus; but, towards the distal end, this convex superior surface becomes * [There is something approaching this condition in the limb bone of Saurodesmus Bobertsoni from Elgin ; and the proximal end of that bone so far resembles Pareiasaurus, in its external crest and internal trochanter as to suggest that the bone may be an Anomodont femur.—July 15,1892.]