. The comparative anatomy of the domesticated animals. Veterinary anatomy. MUSCLES OF TEE POSTEBIOR LIMBS. 293 of the sacrum to the inferior extremity of the femur, following the direction of the ischiatic border of the ilium, into which it is inserted. The tendon to which it owes its penniform shape is inflected outwards, behind the supra- cotyloid crest or sciatic ridge, joins the gemelli, and terminates in the bottom of the trochanterian fossa. Belations.—In its intrapelvic portion, this muscle responds: outwards. COCCYGEAL AND DEEP linSCLES SUEEOUNDING THE COXO-FEMOKAL AETIOULATION. 1, Sup
. The comparative anatomy of the domesticated animals. Veterinary anatomy. MUSCLES OF TEE POSTEBIOR LIMBS. 293 of the sacrum to the inferior extremity of the femur, following the direction of the ischiatic border of the ilium, into which it is inserted. The tendon to which it owes its penniform shape is inflected outwards, behind the supra- cotyloid crest or sciatic ridge, joins the gemelli, and terminates in the bottom of the trochanterian fossa. Belations.—In its intrapelvic portion, this muscle responds: outwards. COCCYGEAL AND DEEP linSCLES SUEEOUNDING THE COXO-FEMOKAL AETIOULATION. 1, Superior sacro-coccygeus; 2, Lateral sacro-coccygeus; 3, Inferior sacro-coccygeus; 4, /scliio-coccygeus; 5, Small gluteus; 6, Anterior gracilis; 7, Tendon of the internal obturator; 8, 8, Gemelli of the pelvis; 9, Accessory fasciculus of the gemelli; 10, Quadratus cruralis; 11, Sacro-sciatic ligament; 12, Great sciatic notch; 13, Superior ilio-sacral ligament; 14, Inferior ilio-sacral ligament. and downwards, to the ilium, pubis, ischium, and external obturator; inwards and upwards, to the peritoneum, important vessels and nerves, and to a fibrous lamina that separates it from the bladder. In its extra-pelvic portion, it is in relation with: behind, the middle gluteal musclp and the sciatic nerves ; in front, with the gemelli. A synovial sheath facilitates the gliding of its tendon in the groove in which it turns. Action.—It is a rotator of the thigh outwards, and, contrary to the opinion of the majority of authors, we believe it to produce abduction rather than adduction, if at any time its position allows it to execute either of these two movements. 9. Gemelli of the Pelvis (Fig. 131, 8, 8, 9). Synonyms.—Ischio-troehanterius—Girard. (^Gemini—PercivaU. Bifemoro-calcanem —Leyh.) The two small muscles which receive this name are far from presenting the same disposition in every subject; but we will describe that which appears to be the most frequent. Two little elongate
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