706 EDWIN S. GOODRICH. 



It is evident from tlie above quotations that although^ 

 through the labours of Hering, Claparede, Krohn^ and 

 Greeff, the anatomical relations of the genital funnels in the 

 mature male Alciopids was known, the real structure of the 

 nephridium and its morphological relation to the genital 

 funnel were not understood. 



Phyllodocinse. 



The Nephridium. — Like their allies the Alciopinas, the 

 Phyllodociuse have a closed nephridium^ the inner blind end 

 of which bears a large number of solenocytes. In all the 

 genera I have examined, Phyllodoce, Eulalia, Eteone, Ptero- 

 cirrus, the inner extremity of the nephridium is more or less 

 branched, the solenocytes being distributed on the branches 

 in each case in a highly characteristic manner. 



In Phyllodoce paretti, for instance, they form fan-like 

 bunches at the tips of the branches only (fig. 14). The 

 tubes are here almost as long as in Alciope, the cell-body and 

 its contained nucleus being perched on the distal end of 

 each. This little rounded cell-mass gives off no processes, 

 and contains a few highly refringent globules. There are 

 no external cilia on the coelomic surface of the organ. 



In most Phyllodocin^, however, the solenocytes are ar- 

 ranged not only at the tips, but also along the whole length 

 of the terminal branches, as in Nephthys (11). These 

 branches may be fused at their bases, forming a broad 

 grooved plate-like organ, somewhat resembling the nephri- 

 dium of Glycera (12). 



In the large worm Eteone siphonodonta, the nephri- 

 dium of which is just visible to the naked eye, there are an 

 immense number of solenocytes closely ranged in rows along 

 the grooves and lobes on the upper surface. As in Phyl- 

 lodoce paretti, the cell-body and nucleus is supported at 

 the distal free end of the somewhat conical tube (figs. 10 

 uud 11). The nephridial canal gives off several main 

 I)ranches, which divide again into secondary branches, as in 

 the Glyceridae. 



