110 THE MEMBRANOUS LABYRINTH, BY PROF. RUDINGER. 



the greater number of animals, divided in the form of two 

 flat fasciculi, and associated with ganglion cells (Ley dig, Hasse), 

 into the groove visible on the external surface, and runs in an 

 almost straight direction through the tunica propria, as far as 

 the epithelium of the crista acustica. This becomes two or 



311. 



Fig. 311, Transverse section of the ampulla of Rana esculenta. 

 1, Roof of the ampulla ; 2, semicircular canal ; 3, epithelium lining 

 the roof of the ampulla ; 4, thick portion of the wall of the ampulla ; 

 5, nerves, with cells scattered through them ; 6 and 7, epithelium, 

 with the auditory hairs ; 8, fasciculi of nerves ; 9, pigment, 



three times thicker than elsewhere, and is bounded internally 

 by a structureless basement membrane. This is not, however, 

 the only supporter of the nerves, since the lower portion of the 

 more or less rectangularly rising lateral walls of the ampulla, 



