18. 



of the .-above discussed characters were found as in the sum 

 tctn.1 of the fsmiil* examined of this 8p*oi*e. 



The "jxoretory syste-ri of the r^dia (fig. 31) IB often 

 difficult to ^eo ind i fcsunri it impossible tc: moSre out 

 even under the very best microscopical condition. The 

 mnst difficult part to ma^a out proved to be the eftpillaries i 

 and smaller tubul^* n.t either end r-f the collecting tubules. 

 The excretory pore is located on th* sid vund elightly 

 in front of the posterior projection 0f t)i body* Im- 

 mediately underneath is a small bladder, *yhioh giv^e off two 

 br'inchf?<3, the collecting tubesi, one extending posteriorly 

 and the other anteriorly. Olofe around the posterior pro- 

 jection eighteen fl me oella were eeen. Ko plan of 

 brnnchinfi or ^tt^^iiaent of the oapillariea could be made 

 out du to the extreme soiling* At the anterior end, a short 

 distance behind the intestinal sao 8venteen flame eel Is 

 were *een. These opillari*m and no^eflpory collecting 

 tubes were al^o much coiled and so the pattern oould not 

 be dtrmined here either: Feasibly ot^er fl?ime cf?ll are 

 to be found r,t either end. It is quite probable that this 



condition of the excretory system prevails on both sides 



although 



n * given peniraen it "?as never BO seen. Other 



redi 4o, whose excretory ey^teia ha been worked out nhow it 

 to be bilateral nmd the pattern to be quite definite. Thin 

 bilaterality i9 well illustrated by LOOBB (1896, fig* 1&3) 

 in the redia of O^eroaria diatomatosa Sons* It also has it 

 cap ill arias and fl'^ime oella arraaie*d in Croupe of three 

 He also shows the young redia of Amphiatomura conic am H. 



