LESSON XXX. 



THE INTERNAL EAR. 



1. Semicircular canals of skate. Transverse 

 section in paraffin of crista acustica. (Flemming's 

 fluid; picrocarmine.) Observe 



The projection (conical in section) of the crista, 

 composed mainly of homogeneous-looking connective 

 tissue. 



The numerous large medullated fibres running up 

 the projection. 



The cap of epithelium thicker than elsewhere. In 

 this note the superficial columnar cells, and two or 

 more rows of deeper lying nuclei belonging to the 

 fibre cells ; here and there the slender inner and outer 

 process of a fibre cell will be seen. 



Hair-like processes projecting from the cap of 

 epithelium. 



On either side of the crista, the thinner connective 

 tissue wall, and the single layer of short columnar or 

 even flattened cells. 



