MALE ORGANS OF REPEODUCTION 



491 



mediastinum they are abruptly transformed into peculiar efferent ducts, 



10 to 15 in number, which pass into the glolms major of the epididymis 



and by means of spiral windings form conical masses, coni vasculo&i, 



whose apex projects into the glo- 



bus major. The epithelium of 



these tubules is peculiar in that 



it contains two varieties of cells, 



and in that it is thrown into 



many prominent longitudinal 



folds or ruga?. 



In the lining epithelium there 

 are short columnar cells which FIG. 435. A SMALL PORTION OF THE WALL 

 rest upon the basement mem- F AN EFFERENT DUCTULE OF THE TES- 

 brane and carry upon their free 



ends a tuft of short cilia. These d > '? lands ' in longitudinal section; d', the 

 ,, , ... . same in oblique section; F, ciliated epithe- 



cells have an ovoid nucleus and a i ium . x 140 . (After K 611iker.) 



very finely granular, eosinoph-il 



cytoplasm. Between and among the ciliated cells are many broad col- 

 umnar or polyhedral cells, having remarkably clear cytoplasm, which 



FIG. 436. EFFERENT DUCTULES OF THE RABBIT'S EPIDIDTMIS. 

 Hematoin and oosin. Photo. X 250. 



