(3) 



Menori (17) has lately publishea a short paper on tlr^ Actin- 

 otrocha ^ in wiiicii he considers t,'ne Phoroniaae to be related to 

 the Choi-aata but tr;inks the relationship is to bo traced tnrou^i 

 a fonn like Rhabdo pleura. 



I bc^BM the study of tne development and anatoriiy of Phoron- 

 is architecta before the publication o "^ the last four papers 

 mentionea; aiid when they appeared I was almost aissuaded fl^'oiij 

 continuiiif- my work, Hov/ever si'uce there seem to be s^^ecific 

 di'^ferences a"nd since there are several disputes points in the 

 development, it seems best to publish the resultd of mj study. 



It is hardly necessary to enter into a historical account 

 of the work that h^s been aone on the development and anatomy 

 of the Phoronidae since there are several papers vhich. have re- 

 viewed tl;e subject exhaustively. 



lie t hods . 



Most of the material, eg-,3, larvae and adults, were fixed 

 in a saturated solution of corrosive sublimate, to which r.ad 

 been added two per cent of ^jlacial acetic acia. A fres). so- 

 lution v.'as made as soon 8,s ti.e fine white precipitate appeared 

 Which is usually present in old solutions. This fixin^ agent 

 gave very ^ood results. Material fixed in Perenyi's fluid was 

 found more valuable in some few respects thaii tlie acetic subli- 

 mate. V/hen setrmcntaticn staf^^es v;ere treateav/ith a five per 



