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Show 398 DR. B. C A. WINDLE AND MR. F. G. PARSONS ON THE [Apr. 6, (10), and Genetta (17), but they fused high up in the forearm in Viverra civetta (12), in Genetta (18), Herpestes (24), and Proteles (25). Among the Hyaenidae the head from the olecranon was absent in H. striata (27) and H. crocuta (29), but in H. striata (26) both heads were present and joined high up. Among the Canidae we have records of the dissection of this muscle in six specimens of C. familiaris (31, 32, 34, 36, 37, 39), in one of C. aureus (41), in C. lagopus (42), and in Lycaon pictus (44). In all these nine animals the two parts were distinct. Among the Ursidae we unfortunately have records of only two specimens (49, 52), but in both of these the muscle was double. In the Procyonidae the two heads are distinct in Procyon lotor according to Allen (54), but united in our experience (53). In Nasua (60) and Cercoleptes (61) Ihey are fused. Among the Mustelidae the two parts unite high up in Mustela putorius (65) and Ictonyx (70). In Lutra vulgaris (76) they join about the middle of the forearm, while in L. cinerea (78) and Meles (71, 72) they remain distinct. The insertion of both parts is usually into the pisiform bone, but in H. striata (26) expansions are continued to the four metacarpals, while in Testut's specimen of Ursus americanus (50) the tendon passed the pisiform and was inserted into the fifth metacarpal. Both bellies of the flexor carpi ulnaris are supplied by tbe ulnar nerve. Flexor profundus digitorum.-In a former paper (XLV.) one of the authors has described this muscle as consisting of five primary parts, condvlo-radialis, condylo-ulnaris, centralis, radialis, and ulnaris ; so that when the typical arrangement is present there are three origins from tbe internal condyle as well as one each from the radius and ulna. It is difficult to be quite sure in all cases which of these parts were really present, since different autbors have adopted different methods of description, but in most instances the arrangement is evident enough. Among tbe Felidae all tbe heads are present in F. catus (6, XLV.). In the Viverridae all five origins are present in Cryptoprocta (10), Genetta (16, 16 a, 18), Paradoxurus (19, 20), Vlverrlcula malaccensis (15), and Cynictis penlcillata (XLV.), while in Herpestes nepalcnsls (23), H. griseus (24), and Viverra civetta (13) the centralis was absent. In all these animals there is a slip to the pollex as well as to the other four digits. In the Hyaenidae it is not possible to say wdiich elements of the muscle were present. In Hycena striata (26) Young found no slip to the pollex, though Meckel describes a small one in his specimen of tbe same animal (27); in H. crocuta (29) the pollex slip was also absent. It is interesting to notice that, so far as the pollex tendon goes, Proteles (25) agrees with the Viverridae rather than with the Hyaenidae. Among the Canidae, Windle found all the beads present and distinct in the clog (XLV.). In Cuvier and Laurillard's dog (39) the centralis is apparently wanting. In another dog which we dissected (31) the condylar heads were fused into one broad origin from the internal condyle, though we are inclined to think that the centralis was not combined with |
