THE MUSCLES. 



315 



Other muscles, not present in man, may exist where com- 

 plex branchial arches replace his rudimentary thyro-hyals or 



FIG. 285. MUSCLES OF VENTRAL SURFACE. 



On the right side, superficial muscles; on the left side, deeper muscles, the 

 mylo-hyoidei, pectoralis, and external oblique being removed. Also superficial 

 flexor muscles of right pectoral limb of Meuobranchus. 



B, biceps; CB 1 and CJ3 2 , coraco-brachialis ; CHE, cerato-hyoideus externus ; 

 EO external oblique ; FL, flexor longus ; GH, genio-hyoid ; MH and 

 7J/// 2 , mylo-hyoideus ; OH, omo-hyoid ; P, f\ and P 2 , pectoralis; R, 

 rectus ; 3", subclavius ; SH, sterno-hyoid ; SL, supinator longus ; T, triceps. 



