Researches on the Structure, Organization, and Classification of the Fossil Reptilia VII Further Observations on Pareiasaurus . bone, and is moderately concave. The least transverse measurement of the shaft in the middle is 1^ inch; and itsleast anteroposterior measurement is 2 inches. The Carpus. The carpus appears to consist of two rows of bones, but it is not perfectly principal carpal was beneath the radius. It is a large transversely ovate bone,convex above, so that its surface corresponds to the concave distal end of the articulation is about 4 inches long by 3
Researches on the Structure, Organization, and Classification of the Fossil Reptilia VII Further Observations on Pareiasaurus . bone, and is moderately concave. The least transverse measurement of the shaft in the middle is 1^ inch; and itsleast anteroposterior measurement is 2 inches. The Carpus. The carpus appears to consist of two rows of bones, but it is not perfectly principal carpal was beneath the radius. It is a large transversely ovate bone,convex above, so that its surface corresponds to the concave distal end of the articulation is about 4 inches long by 3 inches wide. The anterior surface isconvex from side to side with a curve like that of the radius, it is flat vertically§mooto, and 1 inch deep. AND CLASSIFICATION OF THE FOSSIL RBPTILIA. 363 On the right side it was met by a second ossification, now displaced, beyond whichthere may have been others. On its inferior border are two small carpals of thesecond row, which appear to have had a close union with the proximal carpal. Eachbone is more than an inch in each measurement. The distal surface of the principal Fig. Principal carpal bone of the right side. carpal is convex. I regard it as formed of the scaphoid and lunar bones as inTheriodesmus, but whether the two bones below are the centralia, as seems probable,must remain for the present uncertain. The metacarpal bones appear to be smaller than the metatarsals, but they have thesame form; yet the fore foot was rather the larger. It had a transverse width of10 inches, and a length of 9 inches. All the phalanges are similar to those of the Fig. 17. Fig. 16.
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Keywords: ., bookauthorseeleyh, bookcentury1800, bookdecade1890, bookyear1892
