MR. ST. G. MIVART ON THE SKELETON OF THE PRIMATES. 219 
In these last six figures, @ represents the articular head; 4, the bicipital groove ; 
ec, rough surface, probably for the coraco-brachialis; d, the lesser, or ulnar, tuberosity ; 
e, the greater, or radial, tuberosity; 4, the external condyle; m, the perforation in the 
coronoid fossa; 0, the internal condyle; p, the capitellum; g, the trochlea; s, musculo- 
spiral groove. 
PLATE XXXVII. Clavicle and Radius. 
Fig. 1. Anterior surface of the right clavicle of the specimen No. 3C in the British 
Museum. 
Fig. 2. Superior surface of the same. 
Fig. 3. Inferior surface of the same. 
Fig. 4. Anterior surface of left clavicle of the variety Morio. 
In these figures, @ represents the acromial end of the bone; c, the tubercle for the 
conoid ligament; d, the prominence for the deltoid; p, ridge probably for pectoralis 
major; 7, rough surface for costo-clavicular ligament; s, sternal end of the bone; 
t, ridge for trapezoid portion of coraco-clavicular ligament. 
Fig. 5. Anterior surface of the right radius of specimen No. 3 B. 
Fig. 6. Posterior surface of the same. 
Fig. 7. Posterior surface of distal end of the same, showing the grooves for the extensor 
tendons completely. 
Fig. 8. Distal surface of the same. 
a, process for the supinator longus; 8, tuberosity; f, the styloid process; g, surface 
for ulna; h, the surface for the scaphoides; 4, groove for extensor ossis metacarpt 
pollicis ; 1, that for ex. carpi radialis longior ; m, that for the ex. carpi radialis brevior ; 
_ 0, that for the extensor secundi internodii pollicis; p, that for the eatensor communis 
digitorum; u, the surface for the semilunare. 
PLATE XXXVIII. Una. 
Fig. 1. Anterior aspect of right ulna of the specimen No, 3C. 
Fig. 2. Ulnar (or inner) aspect of the same. 
Fig. 3. Posterior aspect of the same. 
Fig. 4. Radial (or outer) aspect of the same. 
Fig. 5. Posterior surface of the olecranon of the same. 
Fig. 6. Side view of the distal end of No. 3 A. 
Fig. 7. Distal surface of ulna of No. 3 A. 
a, radial or outer margin; 6, nutrient foramen; c, fossa for brachialis anticus; d, 
lesser sigmoid cavity; e, ridge running downwards and backwards from that cavity ; 
f, surface for anconeus; g, greater sigmoid cavity; h, the distal articular surface ; 
s, styloid process; 2, ridge for attachment of pronator quadratus. 
2H 2 
