(71) 



I have nothing nev/ to aaa concerniiit^ the liephridial cai.al 

 except tiiat a loiiti tuainal section thirout^:h it which has been 

 stained 7;i th iroxi haematoxylin shows lon^ fla^ella extending 

 some distance from the ais tal end into its lumen. (Fi^, ok;(j..,) ) 



Sections which 1 have made of the Actinotrocha of Pho ronis 

 oabatieri show that ti.e i'Opi:ridia resemble those of otner Ac- 

 tinotrochae 1 have studies, althouj^i. they do not seem to be as 

 well developea as tr.ose o *^ Species, A. and E. The speciinens 

 at hand show that the inten.al openin^^ in the collar cavity is 

 situatea at about the saire level cts in other Actino t roci^.a? i*na 

 not at the level of the oesophagus as rioule (20) has indicated. 



The course v/hich the canal taices i^ like th^t v/hich has 

 been describes by other invosti^ators and I a^ree v/i tt. tae ob- 

 servation of others in re^jard to the nephridial canal openin^: 

 to the exterior at the sides cf tne ventral pouch opeiiiiit,, 



Masterman (15) describes a pair of ciliatea pores openint^ 

 to the exterjor on the dorsal stirface of tiie preoral lobe. 

 These, he finds, lead into tubes closely similar in cross sec- 

 tion to the cross section of canals of the collar nephridia ana 

 these tubes have an internal openin_, into the preoral lobe cav- 

 ji.y. He compares the external pores to the proboscis pores of 

 CephalodTiscus. In the Zoo. Ajri2iir.-1901-vo 1. xxi v-p, 251, he ad- 

 mits that their :oc cur rence is variable. llo other investigators 



