118 THE MEMBRANOUS LABYRINTH, BY PROF. RUDINGER. 



hairs are seated, but into its precise relations I have gained no 

 satisfactory insight. 



The length of the auditory hairs amounts, according to Max 

 Schultze, in the Ray tribe to 0'04 Prussian lines. They are 

 disposed at definite distances from each other, and undergo 



Fig. 314. 



Fig. 314. Longitudinal section of the ampulla of a Bird. 1, Osseous 

 wall ; 2, periosteum ; 3, space between the osseous and membra- 

 nous canal ; 4, roof of the ampulla adjoining the bone ; 5, thicken- 

 ing of the crista acustica ; 6, nerve fibres contained in it ; 7, columnar 

 cells of the floor in the vicinity of the nerve eminence ; 8, line of 

 demarcation between columnar and pavement cells ; 9, pavement 

 epithelium ; 10, transition of the ampulla into the membranous 

 canal. 



very rapid changes in their form and appearance on the ad- 

 dition of various reagents. I have found the basal portion of 

 the hair, both in Mammals as well as in Fishes and Frogs, even 

 with the most careful manipulation, somewhat thicker than 

 Schultze has described and pictured. 



