. On the anatomy of vertebrates [electronic resource] . from between the pronator teres, 6, and palmaris longus, 8; butin the Gorilla, fig. 24, 4, it derives a considerable accession of v; Muscles of the fore-arm and £6 ANATOMY OF VERTEBRATES. fibres directly from the radius, and its tendon js shorter and much thicker than in both it passesthrough a pulley pro-vided by the trapeziumto its insertion into thebase of the metacarpalof the index. Thetendon of the supina-tor longus in the Go-rilla, fig. 24, 4, is alsoshorter and thicker,and is not crossed, asin Man, by the exten-sor
. On the anatomy of vertebrates [electronic resource] . from between the pronator teres, 6, and palmaris longus, 8; butin the Gorilla, fig. 24, 4, it derives a considerable accession of v; Muscles of the fore-arm and £6 ANATOMY OF VERTEBRATES. fibres directly from the radius, and its tendon js shorter and much thicker than in both it passesthrough a pulley pro-vided by the trapeziumto its insertion into thebase of the metacarpalof the index. Thetendon of the supina-tor longus in the Go-rilla, fig. 24, 4, is alsoshorter and thicker,and is not crossed, asin Man, by the exten-sors of the metacarpaland first phalanx ofthe pollex (fig. 23, 11and 12) before its in-sertion into the styloidprocess of the of the carneousmass of the flexor sub-limis disritorum is seenat 13, fig. 23, and g,fig. 24. External tothis a greater pro-portion of the flexorprofundus appears inthe Gorilla, fig. 24, 6,than in Man, fig. 23,15. The flexor longuspollicis, fig. 23, 14, ex-pends its force in theGorilla, fig. 24, 20,upon both the pollex. furnishingthe distaleach, but and index,tendons tophalanx ofthe largest and mostdirect being that to theindex. There are mo-difications of minorimportance in the origin of this muscle which tend to give it a Muscles of the fore-arm and hand, Gorilla. MUSCULAR SYSTEM OF MAMMALfA. 57 character of being part of the system of the ( flexor profundusin the Gorilla. The relations of the tendons of the superficial and deepflexors to each other and to the digits are much alike inMan and Ape, but the tendons are relatively broader, andtheir restraining and strengthening sheaths and bands strongerin the Gorilla; those formed by the oblique decussating liga-mentous fasciculi, as in the mid-finger of fig. 23, are moredistinctly shown in Man than in the Ape. The muscles actingon the metacarpal and first phalanx of the pollex—fig. 24, 22, abductor, ib. 24, flexor brevis, ib. 25, adductor — are longerand more slender in the Gorilla. The abdu
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