MUSCLES OF THE BACK OF THE TRUNK. 
477 
Fig. 226— Muscles of the Back of toe Trunk, the Superficial Layer being 
SHOWN ON THE LEFT SIDE, THE MIDDLE LAYER ON THE RIGHT. 
1. Trapezius; 2, occipital bone; 3, spine of the scapula; 4, acromion process; 
5, deltoid; 6, infraspinatus; 7, teres minor; 8, teres major; 9, latissimus dorsi; 
10, its aponeurosis; 11, glutaeus magnus; 12, space between the latissimus dorsi 
and external oblique; 13, rhomboideus major; 14, splenius ; 15, angularis scapulae; 
16, rhomboideus minor; 17, external oblique; 18, supraspinatus; 19, serratus 
magnus ; 22, inferior serratus minor; 23, internal ob ique; 24, crest of the iliac 
bone; 25, glutaeus medius ; 26, pyramidalis; 27, gemellus superior; 28, obturator 
internus; 29, gemellus inferior; 30, quadratus femoris; 31, semi-membranosus ; 
32, tuberosity of the ischium; 33, insertion of the glutaeus maximus; 38, long 
head of the triceps extensor of the arm. 
