STUDIES ON CILIATED CELLS 227 



scattered or form rows. The type of cell which I have found 

 among the peritoneal cells near the oviduct is represented in 

 figure 68. The ciha are comparatively thick and are connected 

 with spherical basal bodies; a special cuticular border seems 

 to be wanting in this cell. 



14- The trachea of Trigonocephalus. The ciliated cells in this 

 part (fig. 69) have on their free surface, cuticular borders and 

 relatively long cilia. The basal corpuscles are differentiated 

 wdth difficulty, and therefore appear in most cases as a dark fine 

 underneath the cuticle. In tangential sections they appear as 

 minute granules, closelj' appfied to one another, the whole, at 

 first sight, resembfing a fine network. On close inspection, how- 

 ever, I had no difficulty in making out linear series of granules, 

 arranged in a determinate direction. The transparent zone and 

 the chondriocontes behave in the same manner as described in 

 other species. Cifiated cells with two nuclei are not infrequent. 



16. Efferent tubules of the testis of Reptilia. Of the reptiles, 

 have studied snakes, adders and lizards. The epithelium con- 

 sists of cifiated cells and cells with brush borders. The former 

 are small in number in proportion to the latter. At the free 

 extremity of the ciliated cells (figs. 72, 73, 76) there is a narrow 

 zone, darkly stained by iron-haematoxyfin and presenting the 

 appearance of a cuticular border. The basal corpuscles are 

 either imbedded in this zone or situated beneath it. The chon- 

 driocontes are collected below the cuticle, being separated from 

 it by a narrow transparent zone. Binucleat^ ciliated cells often 

 occur in the efferent duct of these forms. 



16. The oviduct of the lizard. The oviducal epithelium con- 

 sists of cifiated and glandular ceUs. The former are few in 

 number as compared with the latter and bear on their free sur- 

 face thin cuticular borders. The basal corpuscles are in most 

 cases rod-like granules imbedded in the cuticle; in other cases 

 they appear as small spherical bodies beneath the cuticle. This 

 difference maj^ perhaps be connected with the degree of stain- 

 ing. The transparent zone is illy defined; binucleate cifiated 

 cells are not rare. 



