| OCR Text |
Show 584 ROF. M . W A T S O N O N T H E [June 20, each metacarpal bone. In H. crocuta, on account of the rudimental condition of the inner toe, the deep layer of interosseous muscles consists only of eight muscles. Muscles of the Hind Limb. The gluteus maximus of Proteles resembles that of //. crocuta, but differs inasmuch as the posterior portion of the muscle is quite distinct from and not united with the biceps as in H. crocuta. In Viverra the gluteus maximus presents a totally different arrangement. The pyriformis in Proteles, as in H. crocuta, H. striata, and Viverra, is quite distinct from the gluteus medius. The gluteus medius is not divisible into two planes of fibres as in H. crocuta. A gluteus quartus is present in Proteles, as in H. crocuta and Viverra. The insertion of this muscle in Proteles is considerably lower than in H. crocuta. In the latter it occupies the middle of the anterior intertrochanteric line, whereas in the former it is inserted into the inner side of the shaft of the femur half an inch below that line. There is only a single gemellus in Proteles. It is a strong muscular bundle which surrounds the tendon of the obturator internus. In H. crocuta and in Viverra the gemelli are two in number. The quadratus femoris is entirely absent in Proteles, which therefore differs both from H. crocuta aud Viverra. The semimembranosus, as in H. crocuta, is either absent or is inseparably united with the adductor magnus. In this respect Proteles differs from Viverra, in which the semimembranosus is quite distinct from the adductor magnus. The semitendinosus of Proteles is inserted into the tibia lower down than in H. crocuta. In this respect Proteles resembles H. striata. In Viverra this muscle has an additional caudal origin, which is not present either in Hyana or in Proteles. The sartorius of Proteles differs from that of H. crocuta inasmuch as the muscular fibres in the upper third of the thigh form a single mass, which only divides into two parts lower down. In H. crocuta the two parts are separate from end to end ; in Viverra, on the other hand, the muscle is single. The gracilis is not attached directly to the pelvic bone as in H. crocuta, but arises from a strong aponeurosis covering the adductor muscles. Its fibres are continuous with those of the opposite muscle. Its insertion differs from that of the muscle in H. crocuta inasmuch as the lower fibres are inserted into a stout fibrous band which lies parallel with, and is inserted into the inner side of the tibia at the junction of the lower and middle thirds of that bone. In Proteles, as in H. crocuta, the pectineus is single at its insertion. In Viverra it is double. The origin of the adductor brevis is relatively more extensive in Proteles than in H. crocuta. The rectus femoris of Proteles differs from that of H. crocuta and |
