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Show 1900.] MR. F. E. BEDDARD ON BASSARICYON ALLENI. 671 muscle appears to be inserted on to the end of the radius. It was inserted accurately into the middle of that bone in Bassaricgon. The Flexor carpi radialis did not seem to be inserted on to a metacarpal but on to the radial carpal. The Flexor carpi ulnaris is single-headed and is inserted on to the pisiform. The Palmaris longus is a thin muscle associated with the last and overlapping the flexor sublimis : it spreads out below into a fascia. This muscle I believe to be the palmaris longus externus. The internus I could not discover, so that in this particular Bassaricyon departs from its ally Cercoleptes, where both muscles are present. The Glutceus maximus has a fleshy insertion on to the middle of the femur for a very considerable part of that bone, after the great trochanter. The anterior part of the muscle is inserted quite separately on to tbe trochanter, there being a considerable interval between the insertions of the two muscles. It nearly completely hides the underlying glutceus medius. This muscle is very thick and fleshy and shows traces of being a compound structure including the piriformis. At the insertion the distinction of the two is quite obvious. The Glutceus minimus arises and is inserted below the last. The Tensorfascice has a flat tendon and a short and flat muscular belly ; it is inserted on to the fascia about half-way down the thigh. The Sartorius is comparatively narrow at its origin, but it widens out greatly at its insertion, entirely covering tbe knee. The Gracilis is formed of two quite distinct parts whose origins occupy together the whole length of the symphysis pubis ; they unite before their insertion on to the leg; the posterior half of the muscle is tbe larger and has a partly tendinous origin. The Biceps is two-headed : one, which is chiefly tendinous, springs from the tuber ischii ; the other, which is fleshy, arises in common wTith the glutaeus maximus. The insertion on to the leg is not very extensive, about the upper one-third. I could not find a Caudo femoralis. The Pectineus is a huge fleshy muscle divided into two layers, and is distinct from the Adductor. There is but one adductor, which is strap-shaped aud fleshy throughout. It is inserted at the end of the femur and partly on to the tibia. I am not quite certain whether this may not be the presemimembranosus of Messrs. Windle & Parsons. The Semitendinosus has a strong, narrow, round tendon of origin from the tuber ischii and no second head. The Semimembranosus presents no particular features of interest. The Tenuissimus muscle of this animal is very plain on dissection, although extremely slender. It arises beneath the glutaeus maximus ; it ends in a flat tendon which is closely associated with the semitendinosus but close to the insertion of the latter. The Gastrocnemius is two-headed. 44* |