. Cunningham's Text-book of anatomy. Anatomy. THE HIP BONE. 233 pubis) and an inferior (ramus inferior ossis pubis). The broad part of the bone formed by the fusion of these two rami is the body. The body of the os pubis has two surfaces. Of these the posterior or postero- superior is smooth, and forms the anterior part of the wall of the small pelvis ; hereto are attached the levator ani muscle and pubo- prostatic ligaments, and on it rests the bladder. The anterior or antero-inferior surface is rougher, and furnishes origins for the gracilis, adductor longus, adductor brevis, and some of the
. Cunningham's Text-book of anatomy. Anatomy. THE HIP BONE. 233 pubis) and an inferior (ramus inferior ossis pubis). The broad part of the bone formed by the fusion of these two rami is the body. The body of the os pubis has two surfaces. Of these the posterior or postero- superior is smooth, and forms the anterior part of the wall of the small pelvis ; hereto are attached the levator ani muscle and pubo- prostatic ligaments, and on it rests the bladder. The anterior or antero-inferior surface is rougher, and furnishes origins for the gracilis, adductor longus, adductor brevis, and some of the fibres of the obturator externus muscles. The medial border is provided with an elongated oval cartilage-covered surface by means of which it is united to its fellow of the opposite side, the joint being called the facies sympbyseos (symphyseal surface) of tbe pubic bone. The superior border, thick and rounded, projects somewhat, so as to overhang the anterior surface. It is called the crest. In- ternally this forms with the medial border or symphysis the angle, whilst laterally it terminates in a pointed process, the tuberculum pubieum (pubic tubercle). From x Rectus femoris (straight head of origin) Rectus femoris (reflected head of origin). Adductor longus (origin) Pyramidalis abdominis (origin) Rectus abdominis (origin) Gracilis (origin) Adductor brevis (origin) Semimembran osus (origin)' QUADRATUS femoris (origin) Biceps and semitendinosus- (origin) Fig. 232.—Mdscle Attachments to the Lateral Surface of the Os Pubis and Ischium. the crest arise the rectus abdominis and pyramidalis muscles, and to the tubercle is attached the medial end of the inguinal ligament. Passing upwards and laterally from the lateral side of the body towards the acetabulum, of which it forms about the anterior fifth, is the superior ramus. This has three surfaces: an antero - superior, an antero-inferior, and an internal or posterior. The antero-superior surface is triangular in form. Its apex co
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