OUR FACE FROM FISH TO MAN 



ethmoid and sphenoid bones have similar tubular 

 connections with the nasal meati (Keith). 



Nor should the anti-evolutionist be any less 

 embarrassed by the history of the embryonic 

 development of his own nose in comparison with 

 that of other animals. For, broadly speaking, 

 the human nose passes through an early stage in 

 which the olfactory capsule is undeniably like that 

 of a fish (Fig. 65) ; then the lower end of the capsule 

 is prolonged downward in a tube which opens into 

 the roof of the mouth; at this stage the morphology 

 of this region is substantially like that of an 

 amphibian or of a reptile; then horizontal plates 

 (Fig. 66D) grow out from the upper jaw to form 

 a secondary bony palate, so that the mammalian 

 grade is reached in which the inspired air is 

 delivered into the pharynx back of the palate. 



Meanwhile the membranous Eustachian tube 

 has sent off bubble-like outgrowths (Fig. 85), 

 which invade the frontal, ethmoid, sphenoid and 

 superior maxillary bones, forming in them the 

 complex system of sinuses and antra which in its 

 entirety is peculiar to man and the higher anthro- 

 poid apes (Keith). 



With regard to the external nose, neither the 



162 



