Researches on the Structure, Organization, and Classification of the Fossil Reptilia VII Further Observations on Pareiasaurus . ing out the specimen, the continuity between the two endsof the bone was lost by removal of the matrix owing to the loss of the fragment left unshaded inPlate 17. I have placed them together, to the best of my belief, as they were in the rock, but it isimpossible to be certain that the original contact was as it is drawn. f * Cat. Fos. Kept. South Africa, p. 12. AND CLASSIFICATION OF THE FOSSIL REPTILIA. 361 in front than behind, rounded a little from back to front, a
Researches on the Structure, Organization, and Classification of the Fossil Reptilia VII Further Observations on Pareiasaurus . ing out the specimen, the continuity between the two endsof the bone was lost by removal of the matrix owing to the loss of the fragment left unshaded inPlate 17. I have placed them together, to the best of my belief, as they were in the rock, but it isimpossible to be certain that the original contact was as it is drawn. f * Cat. Fos. Kept. South Africa, p. 12. AND CLASSIFICATION OF THE FOSSIL REPTILIA. 361 in front than behind, rounded a little from back to front, and roughly anterior inner distal angle is excavated to fit apparently against the posteriorangle of the radius, which partly underlapped the bone. The least transversemeasurement of the shaft is 2|- inches, at about 3 inches from the distal end. Thebone then widens both to the front and back, and developes an elevated crest at thebase of the proximal articulation ; and this ridge is prominently elevated so as togreatly increase the transverse width of the bone, and make its external or posterior Fig. Right ulna and radius slightly separated, showing a proximal articular surface of the ulna, r excavation in the ulna which received the proximal end of the radius. lateral surface concave. It also defines an anterior lateral concavity which receivesthe proximal end of the radius. This concavity further divides the anterior ter-mination of the proximal articulation into two parts, which fork on each side of theradius. The transverse measurement over this sab-radial expansion of the proximalarticulation of the ulna is about 3 inches. Its anterior border is prolonged on theface of the shaft. It terminates in front in a sharp edge which is concave from abovedownward. mdcccxcii.—b, 3 A 362 PROFESSOR 1L G. SEELEY ON THE STRUCTURE, ORGANIZATION, The articulation may be a little distorted, but is a semicircle in contour. Its sidesare sub-parallel, but gently concav
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Keywords: ., bookauthorseeleyh, bookcentury1800, bookdecade1890, bookyear1892
