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Show 1891.] MR. F. E. BEDDARD ON HAPALEMUR GRISEUS. 459 3. Latissimus dorsi from the posterior dorsal vertebrae, slightly overlapped in front by the trapezius, and from the lumbar fascia: it gives off a very decided slip to the pectoralis, which is attached to that muscle by a flat tendon. 4. Dorso-epitrochlear arises from the latissimus dorsi just before it becomes tendinous; it is inserted by a broad thin tendon on to the ulna for a space of g-| inch from the olecranon. 5. Serratus magnus arises from the first 8 ribs and from the cervical vertebrae; it is attached to the posterior two-thirds of the vertebral border of the scapula. 6. Pectoralis major consists of two separable parts only : (1) a clavicular portion from the sterno-elavicular articulation, and (2) a pectoral portion from the sternum and from a few ribs behind the sternum. I could find no trace of the second pectoral muscle, Pectoralis minor. 7. The Suhclavius passes from the first rib to the clavicle. 8. Biceps.-This muscle is two-headed : the long head arises by a long flat tendon passing underneath an annular ligament; the second head arises in common with the coraco-brachiatis longus and is apparently fused with that muscle for some way. 9. Coraco-brachialis is also a double muscle ; the part lying behind the insertion of the teres major (the other part lies in front) is very short and only reaches about one quarter way down the insertion of the said muscle. 10. Triceps has the usual three heads : the long head arises from the lower border of the scapula and also from a fascia covering the infia-spinatus ; the second head arises from the head of the humerus ; the third from nearly the whole of the shaft of the humerus ; the anterior part of this forms an almost distinct head, which appears to correspond to that referred to by Messrs. Murie and Mivart as the "fourth head." 11. Brachialis anticus arises high up on the radial side of the humerus and twists round to the other side, receiving fibres the whole way. 12. The Teres major is a large muscle, inserted as usual and separately by a stout flat tendon. 13. Teres minor is present, as in other Lemurs. 14. Flexor sublimis digitorum;-This is a small muscle arising from the internal condyle of the humerus ; about halfway down the forearm a thin tendon is given off which passes to the conjoined deep flexor tendons ; later the tendon of this muscle splits into four, which supply digits II.-V. The two middle tendons are the thickest and are of equal size; the two outer tendons are considerably thinner, but also equisized. 15. The Palmaris longus arises from the internal condyle; the tendon is § of the length of the entire muscle. 16. Flexor carpi ulnaris is not in any way remarkable. 17, 18. T h e Flexor profundus digitorum and the Flexor longus pollicis blend together before the wrist while yet muscular, though |