(9) 



egrs in the body cavity of the -^areut si;oweci the spiudles of the 

 first rolar body. This 1 -l^ouria to be the case iu Phcrciiis ar- 

 chitecta. C^ig.l) Eggs in the nephridia were founu to be in 

 the sarrie stage and in neither case was there any sign of an en- 

 ti^riiig spermatozoon or a n.ale pronucleus. ("Fig.l) There Is no 

 doubt of the fact that in Phoronis architecta the sperir^to sioon 

 does not enter tl:e egg until tJ:e latter has been expelled from 

 the nephridium. Ikeda observea this fact for Phoroiiia Ijirriai, 

 Segm en tat ion. 



The eggs of Phoronis architecta while still in ti:e body 

 cavity are somev/hat irregular in shape and, as mentioned above, 

 are aecidealy so while passing through the nephridiuiTi. However, 

 a^ter they are laid they become almost perfectly spherical aiid 

 avera,;e 100/X/ in diameter CPig.g) thus measuriiit, the same as 

 the egg of "Phoronis ao l.aples." (Longciiamps (1£) ). The egg 

 is verj opaque, beint. heavily laden ,vith small yull: granules. 

 It is surrounded by a delicate ms.7ibrane whicii, hov;ever, is not 

 vor-j conspicuous being closely applied to the surface but after 

 f2»-^lxiiiaticn, it separates to some extent. (Fi^.^. 2) 



Observations en the segmentation o f^* the egg of Phoronis are 

 conflicting. This part of the development o^ Phoronis seems 

 to have been treated hastily by most observers probably because 

 it la 'difficult' to obtain sufficient material for its study. 



