THE NBPHRIDIA OF THE POLYOH^TA. 707 



In Eulalia viridis, Grif fithsii, and punctifera, and 

 in Eteone lactea the general structure is similar; but tlie 

 nepliridia are much smaller, and the number of solenocytes 

 much less. 



Curiously enough Phyllodoce laminosa, amongst the 

 forms I have studied^ is provided with solenocytes resem- 

 bling rather those of Grlycera unicornis than of its nearer 

 allies. In this Phyllodocid the cell-body of the solenocyte 

 is oval, fixed by its base to the surface of the nephridium, 

 and connected by an elongated '^ neck " with the top of its 

 flagellated tube (fig. 13). These cells are placed in rows 

 facing each other, and at the tip of each branch two of them 

 seem to be joined together by their cell-bodies, as is generally 

 the case in Glycera unicornis (12, fig. 9). 



Numerous long cilia arise from the ccxilomic surface of the 

 nephridium, between the rows of solenocytes, and by means 

 of their rapid movements serve to renew the fluid in the 

 neighbourhood of the tubes (fig. 13). 



The Genital Funnel. — In the Phyllodocinse the genital 

 funnel has much the same relation to the nephridium as in 

 the Alciopinee. Sections of immature specimens of Eulalia 

 show it as a bell-shaped organ, open in front, closed behind, 

 and formed of a deep layer of ciliated epithelium (figs. 27 

 and 17). It is so closely connected with the nephridium 

 that, during a part of its course, the latter is actually em- 

 bedded in the wall of the funnel (fig. 16), recalling the state 

 of things described in Nephthys (11), where the nephridial 

 canal runs through the wall of the '' ciliated organ " (genital 

 funnel). Beyond the funnel the nephridial canal continues 

 alone to the uephridiopore (fig. 15). A longitudinal section 

 through these organs, in a well-developed but not mature 

 male Eulalia (fig. 28), shows that the posterior end of the 

 genital funnel becomes closely applied to the nephridial 

 canal, and that although at this point the walls of the two 

 are somewhat thinned out and flattened together, yet they 

 remain distinct and complete, allowing no passage from the 

 coelom into the nephridial lumen. 



