(b&) 



the subject, Roule (20) ana Ikeaa (9) seem to iiola tr.e view 

 that tke neps-.rilial caiial eiido bliualy wituo^Jt brancuiii^^ ana 

 that the bliiid cr.n is tipred wi ti; excretory cells, v;hich, i-\o\-:- 

 ever, are iio t perforate, 



Masterman (15) x^i^ Vi-^i^c.-^i (17) have anctner view, Tiiey 

 bo tn tniiiA ti.c.t ti.e nepkridial caual teriaiuates iiiten.ally as 

 tv/o (Menon) or i;io re (Mastern^an) funxiels aua ti.e:^ recot^i.i^e the 

 existeiiCe of lorii-^, processes v/ithout luiiiejja attached to tue 

 eiids 0^ the fura.el, 



I have Tiot been able to make a study of the liviii;, i.ephrid- 

 ia o-^ the Actinctrocha but 1 nave iiives tii^ated them by meariS 

 of sections in Species, A. and Species, B. "P'o r this ^.Trpose 

 I have used material -^ixed in ■Fleirimint, • s fluia ana also in 

 corrosive acetic. Tiie sectioxis were stained v/i tn iroii naema- 

 toxyljn. Tly 'work has beeia aoiie with very r.ij^h. pov/ers. 

 (Zeiss obj ,7_^id llo, 12 Zeiss ccmpensatinji occulare) 



The nephridia o ^" tiie tv/o Actinotro chae nave much the same 

 structure but in Species, A.., I h.ave been unable to find that 

 the internal ena of the nephridial canal brancr^es while in Spe- 

 cies, B, , the inten^al end diviaes into two short branches, 



■^ij^s. 52-52(a) -52(b) represent th.ree trails verse sectioiiS 

 throuf.h the anterior part of the nephridium of Species, B, ?i;£, 

 52 is throUi_.h tbe nephridial eanal just posterior to its inter- 



