(110) 



uerve fibers wnich car. be tr^.«:I to tl-.e .aorve riut,. 



Throughout the body wall of the trunk therf; is a subepider- 

 Hial layer of riorvou.s tissue. 



ITephr idia;- 1 have i:othii':, v.ew to adci concerning the adult 

 nephriaia but my observations on ^. architecta confirm those of 

 Eenham (2) for P. Australis. The nephridial cax:als lie iucedded 

 in the ectcder/rial wall in the region of the rectum. They each 

 oten to the exterior through a yore at the side of the anal pa- 

 pilla. "P'ollov/iiig the canal from tha nephridial pore, we see 

 that it passes downward; i, e., posteriorly, f o r a sliort distance 

 and then bends upon itself running upward parallel to tiie descend- 

 ing arm, A short distance above the bend, it opens by one fun- 

 nel into the lateral bo ay cavity (■p'ig.72) and by aiiOther, into 

 the rectal body cavity. ("^ig.yo) 



Rep rodu ctiv e Or gans ;- Ikeda's recent paper (10) on the re- 

 prodi;ctive organs of Phoronis gives a good account of the anatomy 

 aiid development so I shall not enter into a description of them. 

 I am able to confirm Andrews's observations that ti.e male organs 

 develop at a different time from those of the female. 



Ciliat ed Ridge o/^ t he Alimentary Canal ;- Andrews has de- 

 scribed a ridge running along the inner wall of the oral branch 

 of the alimentary canal. C^ig.Sl) H. P. Torrey has found the 

 same structure in P. Pacifica aiid 1 can confirm Aiidrews's obser- 



