Lect. v.] arches of the fac;e. 1 4 1 



cartilage wliicli supports the memljranoiis flap (operculum) 

 of the blow-hole between the eye and the ear. 



There is nothing new in the main part of the skull 

 containing the brain ; in the skeleton of the organs of 

 special sense ; or in the superficial parts of the head — 

 snout, lips, outer ears, and the like ; they are all de- 

 velopments of old things, familiar to the anatomist in 

 low, fishy forms. 



