| OCR Text |
Show 1876.] PROF. T. H. HUXLEY ON CERATODUS FORSTERI. 51 pterygium of Gegenbaur, I) is relatively small; but the enlarged postaxial cartilage (metapterygium, Mt) has extended upwards along the Fig. 11, MENOBRANCHUS ^ 2 ^ The left pectoral fin of Cestracion philippi (letters as before), the left fore limbs of Lchthyosaurus, Plesiosaurus, Menobranchus, and the left manus of Gecko verus. I, humerus; B, radius; TJ, ulna; r, radiale; i, intermedium; u, ulnare; c, centrale ; c\ c2, c3, c4, c6, distal carpals; 1, 2, 3, phalanges of Menobranchus. In Gecko it is uncertain whether x represents the intermedium and the ulnare coalesced as in Menobranchus (i u), or whether x is the intermedium and p is the ulnare, occupying the place of a pisiform bone. postaxial face of the first, until it has not only reached the articular surface of the pectoral arch, but furnishes a large part of the articular 4* |
