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Show 552 MR. J. BESWICK-PERRIN ON THE [June 20, but in no instance have they exhibited so complete and isolated a character as in the Kinkajou. In the Caracal, Paradoxurus, and Dog the short variety of the coraco-brachialis only is represented, the long variety being absent. In the three latter animals the so-called biceps is a monogastric muscle, the long head alone being present. In this respect the Kinkajou presents a remarkable difference from the Dog, the Caracal, and the Paradoxurus typus, exhibiting a much higher grade of muscular development, and approximating more closely to the Primates. As regards the insertion of the biceps in the Dog, it is not always confined to the radius. I found it inserted into both the radius and ulna in a mongrel specimen. Brachialis anticus. This muscle is very large and fleshy. It arises from the delto-pectoral ridge and upper half of the shaft of the humerus below this ridge. It is inserted into the coronoid process of the ulna. It has a similar arrangement in the Caracal and Paradoxurus typus. In the Dog the brachialis anticus is sometimes represented by an exceedingly small muscle which arises from the anterior surface of the lower end of the shaft of the humerus, instead of the more extensive attachment usually ascribed to it. The pronator radii teres is a monogastric muscle. It arises from the inner humeral condyle below the epicondyloid foramen. It is inserted into a rough impression on the outer surface of the shaft of the radius, and into the bone for some distance below this point. It has a more extensive radial attachment in the Paradoxurus. Palmaris longus externus arises by a pointed tendinous process from the internal humeral condyle, and from the septum between it and the adjacent muscles. It is inserted into the anterior annular ligament and palmar fascia; the latter is very thin, but disposed as in the human subject. Palmaris longus internus is a fusiform muscle. It arises from the fascia covering the flexor carpi ulnaris, by a pointed tendinous process, about three quarters of an inch below the internal humeral condyle. It is inserted into the anterior annular ligament close to the pisiform bone; it is also partly continuous into the flexor brevis minimi digiti. This muscle may be regarded as a differentiated portion of the flexor carpi ulnaris; it is entirely supplied by the ulnar nerve. In the Caracal and Paradoxurus there is only the usual palmaris longus. The flexor carpi radialis and flexor carpi ulnaris axe like the corresponding muscles in the human subject. The ulnar nerve and the recurrent ulnar artery pass between the two heads of the latter muscle. The^.cor sublimis digitorum arises musculotendinous from the internal humeral condyle, coronoid process, and their connecting ligament. About half an inch below its origin it divides into a central and two flanking muscles. The two latter terminate in short tendons, which are inserted into the front and lateral aspects (one on each side) of the flexor profundus digitorum tendon, opposite the wrist-joint. The mesial portion divides into four tendons : three of these are superficial; but the fourth occupies the posterior aspect of the muscle, |