(72) 

 have fbijxia these orfiaus. Ikeaa meatioiis the fact tliat flaak- 



shapea fc,lai:ds on the upper face or the preoral lobe occur in one 

 larva otudied by him but he aenies that they are auch ori^ane aa 

 MabtenTian describes. 



Maatennan (lo) also finas thin walled organs lyings in the 

 haemocoel space iirunediately belov/ the anal ciliatea bana. Speak- 

 ing of these (15) he says: " a pair of organs whach I have not 

 fully maae out, but they inay be the ruaiments of t ne t runK ne- 

 phriaia". Masterman, hov/ever, denies their existence in a la- 

 ter paper and no one eldc has seen the organsas far ati 1 know, 



Ruuim^nta of the Adul t Blooa Vessels i n the 4ctinot rociia ; - Many 

 investiga.tors of the Actinotrocha have recognized the beginnings 

 oV the adult blooa vessels but E.B. V/ilson {24) is the first one 

 who clearly states the fact that the cavity containing the blooa 

 corpuscle masses gives rise to the ring vessel of the adult al- 

 t l".o u gh i«e t s el:! n i ko f f s e em s to have r,a a so me such an idea, 



Caldv/ell (3) and Ikeda (9) confirm the statement of Wilson 

 ith reference to the origin of the ring vessel of the adult. 



V/hile Fasterman (15) aescribes a much mere complicated vas- 

 cular system for ti:(i Actinotrocha from St. Anai^ers Bay than that 

 of all the Actino trochae v.hich 1 have examined, yet 1 agree vvit.h 



im in his view triat the cavities of the blooa vessels may be con- 

 sidered as vestit^es of the segjrentation cavity. 



