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Show 1894.] MAMMALIAN HAND AND FOOT. 371 3. BATHYERGUS MARITIMUS. Flexores. The biceps femoris remains fleshy on the leg and ends tendinous (" fascia ") on the foot. The gastrocnemius is strong, and also the plantaris ; the latter is inserted into the fascia and continues in the flexor brevis. The insertion of the soleus is separated from that of the gastrocnemius. The abductor prcehallucis (tibialis medialis) is very strong (23 m m . 1., 5 m m . br., more than 2 m m . thick; the tendon measures 25 mm.), supplied by the n. tibialis. It arises from the upper, inuer, and anterior parts of the tibia, until close to the origin of the tibialis anticus; it ends on the tibial surface of the Ph. The flexor digitorum subl. and prof, are not divisible ; there are in. lumbricales as usual and a m. accessorius. There are two " interossei " for each toe, except for the third toe, which has only one. The interosseus medialis of the hallux comes from the Ph., the inteross. lateralis of the fifth toe comes from an accessory ossicle situated on the top of the P m. d. UNGULATA. 1. HER AX BRUCEI. The muscles of the leg and foot of this animal show some peculiarities which are of less interest for our subject. 2. ELEPHAS AFRICANUS (Embryo). (Roy. Coll. Surg.) Length of the leg 15 cm. The biceps femoris ends on the foot. The gastrocnemius arises only from the inner side of the femur and from the planum popliteum. The plantaris is strong and, after passing behind the calcaneum, ends in the fascia plantaris. From this fascia springs only one muscle, which joins the flexor digitorum communis. Four lumbricales are present. The flexor digit, subl. and profundus join each other in the planta. The tibialis posticus goes on the inner border of the tibia to the dorsum pedis, where it ends on the third and second toes. Beside this muscle there is another which continues partly the semitendinsous (!) and goes to the hallux and the prcehallux. The extensor digitorum longus goes to toes 2-5, the fourth getting two tendons ; as the extensor brevis ends on toes 2-4, the fourth is provided with three tendons. There are three muscles arising from the Ph.:-(1) to the hallux ; (2) to the capitulum of the metatarsal II.; (3) to the 2nd toe, a long thin tendon, besides that of the^e.r. longus. |