720 EDWIN S. GOODEICH. 



slender tube, opening ventrally to the exterior near the base 

 of the parapodium. It passes inwards, and forwards, to the 

 posterior limit of the next segment, where it ends blindly in 

 a tuft of from three to five branches. Along these branches 

 are set rows of soleuocytes ; the tubes towards the inside, the 

 cell-bodies on the outside, joined together in pairs. A long 

 " neck " connects each cell-body, resting on the nephridium, 

 with the distal end of its tube. The granular protoplasm 

 of the " neck " is often drawn out into slender irregular 

 processes. 



Situated quite near the nephridial tuft, so close that the 

 nephridial tube is embedded for a part of its course in its 

 posterior wall, is the rounded '' ciliated organ," or incom- 

 plete genital funnel. Its ciliated surface is marked by deep 

 grooves converging downwards towards a point quite near 

 the epidermis at the intersegmental groove ; here also it is 

 closely connected with the nephridial duct. 



In Nephthys ceeca, at this spot the lower extremity of 

 the genital funnel passes into a sac, or pocket, formed by a 

 fold of coelomic epithelium, in which are aceumulated amce- 

 bocytes loaded with waste products. 



" Glycekid^ (Part II, p. 439). 



In Goniada the nephridium opens ventrally to the exterior, 

 and ends internally in a tuft of short blind branches provided 

 with solenocytes. Goniada emerita has a large nephri- 

 dium of which the internal end has a much subdivided 

 lumen, and solenocytes placed in rows, as in tbe Phyllodo- 

 cinae. The cell-bodies of the solenocytes rest on the surface 

 of the nephridium. 



The genital funnel consists of a trumpet-shaped ciliated 

 organ, which develops rapidly at maturity, and finally fuses 

 with and opens into the nephridial canal to allow the genital 

 products to escape to the exterior by the nephridiopore. In 

 immature specimens the funnel is in a very rudimentary 

 state. 



