FORE-LIMB. 119 



indicated by numbers and capital letters. 1. Oapiti dorso- 

 scapularis. 2. Basi-scapularis. 3. Thoraci-scapularis. 

 4. Pectori scapularis interims. 5. Pectoralis. 6. Supra- 

 coracoideus, similar to the supracoracoideus of Reptiles, 

 Birds, and Monotremes. 7. Coraco-bracbialis lono-ns. 



* O 



7 *. Coraco-brachialis brevis. Attached to the inner 

 border of the coraco-brachialis longus is a fine tendon 

 coraco-radialis proprius which is considered by some to 

 represent the biceps, but is more likely a purely Amphibian 

 muscle. 8. Humero-antebrachialis inferior. 9. Pro- 

 coraco-humeralis. 10. Dorso-humeralis. 11. Dorsalis 

 scapulae. 12. Anconeus. A. Humero-radialis volaris. 

 B. Humero-phalangei volares n v. C. Humero-ulnaris 

 volaris. The distal fibres of this muscle are continued along 

 the border of the little finger and form an abductor minimi 

 digiti (humero-metacarpus v. dig. volaris). D. Ulnari- 

 metacarpi volares. E. Humero-radialis dorsalis. F. Hu- 

 mero-digiti n-v. dorsalis. G. Humero-ulnaris dorsalis. 

 H. Ulnari-phalanx II. dorsalis. I. Carpo-phalangei. Be- 

 tween the toes are well-developed interossei. 

 Mivart, Proc. Zool. Soc. 1869, p. 264. 



C. 128. Left fore-limb of a Bull-Frog (Rana catesbiand), showing 

 that the tendon of the anconeus is thickened as it passes 

 over the elbow-joint ; that it plays on a convexity at the 

 lower and back part of the humerus, and acts as a substitute 

 for the olecranon. 0. C. 276 B. 



C. 129. Left fore-limb of a Surinam Toad (Pipa americana), 

 showing a sesamoid bone interposed like a patella between 

 the tendon of the anconeus and the elbow-joint. 0. C. 

 276 c. 



C. 120. Left fore-limb of a Lizard ( Varanus salvator), showing 

 the superficial muscles. The muscles, as might be expected 

 from the active and accurate movements of the limbs, are 

 far more numerous and specialized than in the Urodele ; 

 they are in most cases powerful, but show no special con- 

 centration of strength in any particular region of the limb. 

 The following may be noted: The supracoracoideus; a 



