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Show 1891.] DOLICHOTIS PATAGONICA. 239 Some of the Muscles. In dissecting the muscles of Dolichotis I have confined myself to those of the limbs and for the most part to the flexors and extensors of the limbs. I commence by describing those muscles which I have dissected, and shall presently point out the resemblances to other Rodents. MUSCLES OF THE FORE LTMB. The Trapezius is a very extensive muscle, its origin extends back as far as the last rib ; it is continuous in front with a strongly tendinous fascia which passes into a thick layer of muscle, forming thus an almost separate anterior portion of the muscle. The hinder Fig. 3. A r m muscles of Bolichotis patagonica. Pect., pectoralis primus; C.B., coraco-brachialis; Bi., biceps; Brach. ant., brachialis anticus ; Tri., triceps ; Lat. Bor., latissimus dorsi; B. ep., dorso-epitrochlear; #., humerus; Teres Maj., teres major; x, second part of brachialis anticus. part of the trapezius is attached to about the middle of the spine of the scapula ; this insertion is continuous with that of the anterior part of the muscle, which is to the metacromion and by fascia on to outer muscles of humerus ; this insertion is partly covered by that of the panniculus carnosus. The Latissimus dorsi is not attached to the infraspinatus, as it is stated to be in the Agouti by Messrs. Murie and Mivart; its |