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Show 1894.] MAMMALIAN H A N D AND FOOT. 365 There is to be observed the first stage of a crossing of the tendons of the sublimis and profundus, as in the planta pedis. 8. Nerves of the extensor side :- Ramus superflcialis of the musculo-spiral nerve (n. radialis) runs just as in Man. The deep branch, situated between the m. brachicdis internus and the supinator longus, ends in branches for the skin which provide the whole dorsum manus, except only the ulnar border of the fifth digit. 2. HERPESTES GRISEUS. (Zool. Soc. Gardens.) a. Flexores. From the pronator r. teres come tendinous fibres to join the radialis internus (comp. Sciurus). The palmaris longus ends partly in the pads, partly it is inserted into digits 2-5 by delicate tendons which are a little connected with each other. Nerve-supply : n. medianus (only). There are four strong superficial muscles on the wrist, connected with the ligam. c. transv. and also (partly) with the deep ligaments of the carpus :- (1) Origin : Pp.; insertion : pollex. (2) Origin: tendon of the palmaris longus and the former muscle ; ins.: pollex. (3) Origin: tendon of the palmaris I.; ins.: pad of the Pm. (or the pisiform) = musc. transversus carpi. (Nerve-supply not quite sure.) N. ulnaris : (4) A deep muscle like the former, separated from it by the nerv. ulnaris. There are two m. ulnares interni, as in Linsang:- The ulnaris int. ulnaris (proprius), the stronger one, arises from the humerus and the ulna ; it is inserted by a flat tendon into the pisiform, more superficial and ulnar than the following muscle. The ulnaris int. rad. (humeralis) springs from the humerus (cond. int.) and ends fleshy on the pisiform. The flexor digitorum sublimis, supplied by both the median and idnar nerves, divides in four thin and narrow tendons, which end in the tendon-sheaths of digits 2-5. The flexor digitorum profundus has five very strong tendons for the 1-5 digits. The four lumbricales are also connected with the fl. sublimis; they form a mass filling the space between the sublimis and the profundus. 8. Extensores. The supinator longus is fleshy as far as the carpus; its insertion is not quite distinct on one bone ; there is one insertion into the Nerv medianus. < |