570 



COMPARATIVE PHYSIOLOGY. 



Fig. 416.— Otoliths from various animals (after Eiidiiit^rer). 1, from goat; 2, herring; 

 3, devil-fish; 4, mackerel; 5, flying-flsh; G, pike;"" 7, carp; 8, ray; i), shark; 10, 

 grouse. 



G.C\ 



Fig. 417.— Transverse section through head of foetal shcej), in region of hind-brain, to 

 illustrate develn]jment uf ear (after Bottcher). H. B. hind-brain; N, auditory 

 nerve; T- B, vertical ecmicircular canal; Ci\ canal of cochlea; R. T', recessus 

 vestibuli; G. C, auditory ganglion; G', terminal portion of auditory nerve. 



