3S8 NOtES AND MEMORANDA. 



The "central duct" is continuous with the "vesical 

 duct." The walls of the latter region are cellular, as I stated 

 before. I have now found that the cells lining this vesicle 

 duct are, like the other nephridial cells, perforated by ductules 

 communicating with the ductules in the other regions of 

 the gland. — A. G. Bourne. 



