30. 



The genital duct, gd, following the course of the cerebro- 

 visceral commissare, turns ventral I7 wlxen almost in contact with, 

 the inner end of the excretory organ, meets the outer end and opens 

 With IX,, The common opening of the excretory opening and genital 

 duct is, as has been noticed, elongated in an antero-posterior di- 

 rection, figure 65, mco, and may represent a fusion of the two 

 rather than an opening of one Lnto the other. 



As has been seen, the condition described by Pelseneer^ ' 

 viz : the genital duct opening into the excretory organ near 

 its pericardial opening, is not borne out by these obser\rations. 



In material that is not well preserved, it not unfre- 

 quently happens that the walls of the genital duct and the inner 

 end of the excx-otory organ., are ruptured in sectioning, at the 

 point where they come in contact, thus placing th.eir cavities in 

 c oitcnun i c a t i on . 



It may be well to state in passing that the genital ducts 

 of Nucula proxima open into or with the outer end of the excretory 

 organs in a manner similar to that Just described for Yoldia 

 1 imatula. 



GENITAL GLAiroS. 

 These, when distended with th.eir products are very ex- 

 tensive. They pusQi in between the kidneys, below the pericardium^ 



