(29) 



cells to 'rfiich he has c^vcn the iiaTric "conjunetivo-niusculaires 

 elements". These ne represeiits as spii.dlo-shapecl cells terrrd- 

 natec by lent, fiber-like pre loiitjations ana he has n^ured them 

 as beinr quite numerous in the "plasma, transparent et consist- 

 ant", of the coelorrdc cavity. While the youu;. larva of Pno- 

 ronis architecta bears a close reseiublance to tnat o-^^Phoronis 

 Sabatieri described by Roule (liO) , yet at no time durin^ the 

 life of the larva have 1 seen these cells suspended in the 

 body cavity in ducx. numbers as he has shovai, Gpindle-shaped 

 cells with lonr pro Ionizations are quite numerous but t'.ey are 

 usually found applied to the somatic walls of ti:e larva. 



Although recent investit^ato rs have throv/n some doubt on 

 the existence of tne lobe-collar septum yet 1 am satisfied that 

 such a septum exists in the larva of Phoronis arcnitecta. 

 Ikeda (9) has shov/n that it is incomplete iv. the old Actino- 

 trocha ana my observations aji;ree witx: his but it is a fact, 

 nevertheless, that the septum is continually present throu^^hout 

 the larval life of Phorcnis arcnitecta ana that it makes its 

 aqipearance at a very early sta^e in tx:e li-^e history, 



Lon^jchamps (12) says "Si une subdivisions plus ou mo ins 

 complete s* etablissai t , entre ces deux regions, elle ne seriat 

 en tout cas que secondaire, et la cloison s'edifierait aux de- 

 pends de mesenchyme". '''"'rom what I have sai a above,- it is 



