. La cyclopaedia d'anatomie et physiologie. Anatomie ; physiologie ; Zoologie. 280 REPTILIA. surface du pubis, sa confusion marge antérieure à celle de l'glutaeus medius. L'obturateur externus (de Bojanus adducteur) se présente en deux parties, l'une venant de la pu !)est, l'autre de l'ischion ; leurs deux tendons s'unissent pour former un large tendon, qui est inséré dans les deux trochanters. Les adducteurs de la cuisse ne découlent pas de le pubis, mais de l'ischiadic partie de la symphyse pubienne. Un muscle, l'analogie dont il est diffi- cile de reconnaître, découle de la haute sur- face de la

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. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 280 REPTILIA. surface of the pubis, confounding its anterior margin with that of the glutaeus medius. The obturator externus (adductor of Bojanus) arises by two portions, one coming from the pu!)is, the other from the ischium; their two tendons unite to form a broad tendon, which is inserted into the two trochanters. The adductors of the thigh do not arise from the pubis, but from the ischiadic portion of the symphysis. A muscle, the analogy of which it is diffi- cult to recognise, arises from the upper sur- face of the pubis, and goes to be inserted by a strong tendon at the side of the iliacus (iliacus interims of Bojanus, surpubien of Cuvier). In the turtles there is no iliacus, and the suprapubic muscle divides into two fasciculi, the external of which goes to the knee, and joins the rectus of the thigh. Muscles of the Leg. — The muscles of the leg are more recognisable than those of the thigh. In the land-tortoises these muscles are the triceps ; the sartorius, which is divided into two portions; the semimembranosus, which has a large accessory slip derived from the coccyx; the rectus anticus, which is situated slightly internally, has an origin from the ex- ternal ramus of the pubis, and is connected with the articular capsule of the knee joint ; the gracilis is confounded at its origin from the ischium with the adductors of the thigh, but it separates from them, and is inserted at some distance from the head of the tibia. In the turtles the muscles are not so thick as in the land-tortoises; the advanced position of the pubis gives to the anterior rectus great force in extending the thigh and the leg, for it is inserted into the knee almost at a right angle. The biceps and the semimembranosus arise from the coccygeal region only. In the terrestrial tortoises the movements of the foot upon the leg, and of the different parts of the foot one upon the other, are very limited, and consequ

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