262 E. A. BAUMGARTNER 



The free end of the cystic tubule, described in a 47.5 cm. 

 alligator as lying in the ventral part of the anterior lobe (fig. 

 34), possibly representing the vestige of the stalk and closely 

 resembling a similar tubule noted in an adult Sceloporus, is lined 

 by one or two layers of cells. Some of the cells are large spheres 

 with a reticulated cytoplasm and flattened basal nuclei. Others 

 are small, with central oval nuclei and, as in Sceloporus, bear 

 cilia on the inner surface. A reticular substance is found in the 

 lumen. That part of the tubule imbedded in the anterior lobe 

 is about twice the diameter of the free end, and is lined by a low 

 cuboidal, non-ciliated epithelium. The tubule terminates blindly 

 at either end. In the 150 cm. alligator a small cord occupies 

 the same position as the tubule just described. Many cystic 

 tubules present in the caudal end of the anterior lobe in most 

 alligators contain a reticular substance which may take an acid 

 or basic stain. 



Discussion 



In all the reptiles the cells of the pars intermedia are light- 

 staining and non-granular, except in alligators where the pe- 

 ripheral cytoplasm of some cells lying next to the infundibulum 

 stains more deeply with eosin. Sterzi ('04) described large and 

 small cells in the pars intermedia and stated that the large cells 

 retained iron haematoxylin. Investigators usually describe this 

 part as faintly-staining. Tilney ('11) and Stendell ('14) con- 

 sidered the cells of this part basophilic. 



The question as to whether or not there are two kinds of cells 

 in the anterior lobe, has occasioned a great deal of discussion. 

 Sterzi ('04) described three kinds of cells, some clear, others with 

 many chromophilic granules, and a third kind with few. Tilney 

 ('11) and Stendell ('13, '14) represent recent exponents of the 

 two views concerning the cells present. Tilney believes there 

 are two distinct types; acidophilic cells with nuclei occupying 

 eccentric positions, found usually in the center of his 'pars dis- 

 talis;' and large peripheral basophilic cells with central nuclei. 

 Stendell ('13) described acid or basic chromophilic cells and 

 non-granular chromophobic cells. He discussed the opposing 



