BASE OF BEAIK, OPTIC NERVE, AND COEPOEA QUADEIGEMINA. 281 



mucous membrane of the pharynx. Recent investigations {Fleseli, Dostojewsky) 

 make possible the recognition of two kinds of cells in it: smaller, clear cells, and 

 larger, granular, and cloudy cells. Since, as is known, exactly similar elements are 

 found in several very active glands, it is thus probable that the hypophysis also per- 

 forms some physiological function. The hyperplasia of the epithelial part hitherto 



Fig. 180. — The base of the brain; the left lobus temporalis is, in part, rep- 

 resented as transparent in order that the entire course of the tractus opticus 

 might be seen. 



established in several cases of myxoedema points directly thereto. Between the 

 pharyngeal and the cerebral lobes of the hypophysis there is found a number of 

 other epithelial tubules, the lumina of which, as far as I can ascertain, are not con- 



