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Show 356 MR. P. CHALMERS MITCHELL ON THE [May 7 Flexor digitorum profundus reached nearly to the tip of the second phalanx of digit II. Flexor carpi ulnaris. The sesamoid was not ossified. Extensor brevis pollicis arose by two fleshy digitations from the dorsal face of metacarpal I. It was inserted to the base of the thumb. The second abductor pollicis, described by us in Palamedea, was not present. Radio-metacarpalis ventralis absent. Ulni-metacarpedis dorsalis, not found by us in Palamedea, present. The origin is a strong tendon from the distal end of ulna on its dorsal surface near the radius. It divides into a series of digitations, the most radial of which is inserted by a tendon to the base of metacarpals II. and IIL, the others fleshy to the ulnar side of metacarpal III. Muscles of the Thigh and Leg. Sartorius, glutei anterior, medius, minimus, quartus, pectineus, vastus externus, crurceus, vastus internus, biceps, obduratores externus et internus, gemellus, ambiens, soleus, tibialis anticus, extensor digitorum, flexor perforatus et perforans medii, flexor perforatus, flexor profundus, popliteus, flexor brevis hallucis, flexor brevis Jicdlucis secundus, flexor brevis indicis, extensor hallucis, extensor hallucis secundus, abductor indicis, extensor medii, abductor annularis, are all as in Palamedea. Gluteeus maximus. The representative of the postaeetabular part of this muscle found by us in Palamedea is absent. Femoro-caudal. There was only a tendon of origin : the insertion in the tail was fleshy. Accessory femoro-cauded. This muscle, absent in Palamedea, is present in Chauna chavaria. Garrod states that it is present also in C. derbiana. Semitendinosus. The accessory is larger than in Palamedea. The tendon from the two heads joins the inner head of the gastrocnemius, not tbe middle as in Palamedea. Semimembranosus. The tendon of this, after receiving a slip from the tendon of the semitendinosus as in Palamedea, runs into the tibia between the inner head of the gastrocnemius and the accessory semitendinosus. Adductors. There is not so great a difference in size between the two adductors as in Palamedea. The origin of the deeper adductor extends also to the end of the pubis. As in Palamedea, one set of the fibres are inserted to the femur; the other set join, not the middle head of the gastrocnemius, but the accessory semitendinosus. Gastrocnemius. The outer head is as in Palamedea. The middle head is slender, but is quite distinct from the accessory semitendinosus ; it arises tendinously from the intercondylar notch and it joins_ the outer head of the gastrocnemius halfway down the leg. The inner or tibial head arises from the internal condyle of the femur in addition to the origin found in Palamedea. |
