Archive image from page 300 of The cyclopædia of anatomy and. The cyclopædia of anatomy and physiology cyclopdiaofana0401todd Year: 1847 Myology of the Tortoise. 86, abductor digiti tertii, quart et quint s 90, interossei digitorum manus intern. fingers are, in the turtle, few in number, their hand being so flattened out into the shape of a fin or oar as to require neither flexors nor extensors of the fingers; in these, therefore, the analogue of the extensor digitorum coin- munis is confounded with the general apo- neurosis. The flexor communis is slightly more distinct; and the interossei,
Archive image from page 300 of The cyclopædia of anatomy and. The cyclopædia of anatomy and physiology cyclopdiaofana0401todd Year: 1847 Myology of the Tortoise. 86, abductor digiti tertii, quart et quint s 90, interossei digitorum manus intern. fingers are, in the turtle, few in number, their hand being so flattened out into the shape of a fin or oar as to require neither flexors nor extensors of the fingers; in these, therefore, the analogue of the extensor digitorum coin- munis is confounded with the general apo- neurosis. The flexor communis is slightly more distinct; and the interossei, the abduc- tors and adductors of the thumb and of the fifth finger exist, the latter serving to expand or to contract the oar. Bojanus regards the muscle marked79 {fig. 192) as a supinator brevis. In spite of the extreme shortness of the hand in the land-tortoises, the muscles are well developed, and the extensor communis, the extensor, and the long abductor of the thumb, the flexor sublimis, the flexor pro- fundus, the adductor of the thumb, and the abductors of the little finger, as well as the interossei, are met with. Muscles (>f the Pelvis. — In the tortoise the Fig. 199. Myology of the Tortoise. a, glans penis; b, bulbus penis; c, vein derived from ditto; 50, flexor caudse lumbalis; 51, flexor caudae obturatorius; 52, flexor caudaj ischiadicus; 55, protrahens penis. muscle analogous to the quadratus lumber urn spreads out beneath the carapax between the antepenultimate ribs: it is inserted into the ileum near the articulation of that bone with the sacrum, that articulation being in the Chelonians moveable. This mobility of the pelvis is aided by the analogue of the rectus abdominis, which, instead of spreading out beneath the belly, is attached under the posterior extremity of the plastron by two fleshy bellies, one in front and the other behind ; both run to be inserted into the anterior margin of the external ramus of the pubis. Muscles of the Thigh. — In
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