52 



COMPARATIVE ANATOMY. 



FIG. 38. VENTRAL PORTION OF THE PECTORAL ARCH OF Rana esculcnta. 



Sty bony, and Kn, cartilaginous sternum (xiphisternum) ; S, scapula ; KC, carti- 

 laginous portion between the latter and the clavicle (Cl) ; Co, coracoid ; Co 1 , 

 epicoracoid ; m, line of junction between the two "epicoracoids ; G, glenoid 

 cavity for the humerus; Fe, fenestra between the coracoid and clavicle; Ep, 

 omosternum. 



FIG. 39. PECTORAL ARCH AND STERNUM OF A GECKO 

 (Hemidadylus verrucosus}. 



St, sternum ; R, ribs ; Si, cartilaginous cornua to which the last pair of ribs is 

 attached ; SS, suprascapula ; S, scapula ; Co, coracoid ; Co 1 , cartilaginous 

 epicoracoid ; Ep, interclavicle ; a, b, c, membranous fenestrse in the coracoid ; 

 Cl, clavicle ; G, glenoid cavity for the humerus. 



