COMPARATIVE ANATOMY 



lasph 



FIG. 61. A. CRANIAL SKELETON OF SALMON AFTER REMOVAL OF THE JAWS, 



AND ORBITAL AND OPERCULAR BONES. (From the right side.) 

 B. Longitudinal section of the same. The cartilaginous parts are dotted. 



vo, vomer ; p-sph, parasphenoid ; fr, frontal ; ekteth, ectoethmoid ; socc, supra- 

 occipital ; exocc, exoccipital ; basocc, basioccipital ; CoLvert, point of connec- 

 tion of the skull with the vertebral column ; basph, basisphenoid ; orbxph, 

 orbitosphenoid ; alxph, alisphenoid ; epiot, epiotic ; pfero, pterotic ; opisth, 

 opisthotic; proot, prootic ; sphot, sphenotic ; N.olf, canal for the olfactory 



the others are, the articular, angular, and coronoid. The last two, 

 however, may be wanting. 



The hyoid arch is followed by four branchial arches and a 

 rudimentary fifth which forms the "inferior pharyngeal bone." 



