OCR Text |
Show 1885.] MYOLOGY OF THE WATER-OPOSSUM. 17 fourth and fifth toes, but in left foot I easily traced it to outer side of first phalanx of fourth toe. The latter muscle had an exceedingly slender tendon, which I traced in the right foot to the outer side of the third toe, but in the left foot I could not trace it beyond the fascia of the ankle. All the peronei tendons pass behind the malleolus. Extensor brevis digitorum.-Arises from outer side of ankle and apex of fibula. It divides into two (?) tendons, which pass to inner toes and form a tendinous expansion at metacarpo-phalangeal joint with tendon of long extensor. Muscles of Foot. Dorsal Layer.-Abductor minimi digiti consists of two parts- one arising from under surface of os calcis, the other from annular ligament ; both are inserted into outer side of base of first phalanx of minimus. Abductor ossis metatarsi minimi digiti.-Arises from under sur- G.Me. G.Mz. AM. Sm. Myology of Water-Opossum. L, iliacus ; S., sartorius ; P.P., psoas parvus ; P., pectineus; A.B., adductor brevis; A.L., adductor longus; G., gracilis; A.M., adductor magnus; S.m., semimembranosus; St., semitendinosus; B., biceps; Q.F., quad-ratus femoris ; O.E., obturator externus; I.G., inferior gemellus; G.Me., gluteus medius; G.Mi., gluteus minimus ; G.Q., gluteus quartus; R.F., rectus femoris; C, coccygeus; S.G., superior gemellus. face of os calcis external to above. Inserted into outer side of of metatarsal of minimus internal to insertion of peroneus brevic. Abductor annularis.-Arises from base of metatarsal of minimus, cuboid, and sheath of peroneus longus; inserted into outer side of base of first phalanx of annularis. PROC. ZOOL. Soc-1885, No. II. 2 |