110 MESSRS. MURIE AND MIVART ON THE 
Fig. 19. Deep sets of muscles of the under surface of the lumbar, pelvic, and caudal 
regions. The symphysis pubis has been divided and the ischio-pubic portion 
of the right side dragged outwards, to expose the origin of the sacro- 
coccygeus, &c. The quadriceps extensor, adductors, and inner hamstring- 
muscles remain on the left limb. 
Dph. Diaphragm, cut through, leaving its lumbar attachment. 
Qi,Qi*. Quadratus lumborum. In position on left side, and pulled out on right side, to 
show its tendons of origin and insertion. 
Ps.m. Psoas magnus. In situ on left side, and part of origin severed on right side. 
Ps.p. Psoas parvus. Entire on left side and tendon of insertion shown on right. 
Il. Iliacus. Partly hidden on left side and on right severed and dragged out so as to 
expose its double origin pierced by the lumbar plexus. 
Py. Pyriformis. Partly shown as it passes from the sacrum to the femur. 
Gr, Gracilis. Origin cut and thrown back on right side; and Gr* the insertion, 
common with the sartorius and semitendinosus, on the left limb. 
0b.i. Obturator internus ; its flat musculo-tendinous surface of origin. 
P & Ic. Pubo- and ilio-coccygeus, with fleshy belly severed on right side. 
Sc. Sacro-coccygeus. Jn situ on left side, and tendons dragged out on right. 
Ic. Infracoceygeus. | Vi,Vi*. Vastus internus; origin and in- 
It.cd. Tntertransversarii caude. sertion. 
Pe. Pectineus. | Ve. Vastus externus; insertion. 
Ad.l. Adductor longus. | S.mb. Semimembranosus. 
Ad.m. ‘5 magnus. St. Semitendinosus. 
Ad.b. a brevis. Sa. Sartorius; common insertion with 
Rf. Rectus femoris. the above. 
Cr. Crureus. 
L.px. Lumbar plexus of nerves. 
Fig. 20. Adductors, &c. of femur on left side, seen in front. The brim of pelvis, ilium, 
and part of sacral vertebree form the upper segment of the figure. 
Ad.m, Adductor magnus. R.f. Double-headed origin of rectus fe- 
Ad.l. 6 longus. moris. 
Pe. Pectineus. G.md. Gluteus medius (insertion). 
Sa. Sartorius (its origin). Gmc. ,, maximus (insertion of its 
Ps.p. Psoas parvus (tendon of insertion). so-called first portion). 
Ps.m. ,, Magnus ,, ie Va. Vastus internus (origin). 
Ti, VWiacus 3 Cr. Crureus. 
Gr. Gracilis; origin thrown out. | 
