(G2) 

 the preoral lobe arid larval tei:tacles v.oula aeijeiiorate the anal 

 end of the larva "/oulu i.ever oecome turned upv/ara oO ad to lie 

 in clorfe proximity to the mouth. 



As I have said before, 1 am inclined to think that the Ac- 

 tmotrocha S-pecies, F. belongy to an arr^xt v.hich lives under dif- 

 ferent conditions from that of Phoronis architecta and 1 should 

 net be surprised if it v;ere found to be the Ac*;iu^' t ^^cha c t ... 

 u ^- 7/ater form. A-lthou^h Cerianthus cccui's in Beauifi'^rt Rar- 

 er, 1 have never founa Phoronia Australis asoociateu with it, 



Actinotrocha Species, A., as a rule, r;.e tamo rp noses in about 

 20 minutes CFigs, 56-d6(a) -b6(b) ) ain usually just before this 

 takes place, it sinks to the bottom of the disii but occasionally 

 metamorphosis occi^rs on the vertical side of tlio dishi near the 

 surface of the v/ater, the youn^^ Phoronis rcmaininj^ fixed where 

 the metamorphosis takes place, 



Preoral Lobe and Tentacles ;- Usually the larval or aJatui 

 ^L^rt ;^ f the tentacles (Species, A.) ana tn^ ;. ■ .-ax x^be are 

 sv/allovved auring me tarriorphosis. The proximal parts of the ten- 

 tacles become directed Ui...^-a oiid Cunstiti?te th:: tontaci;.s of 

 the c.a^'x-^. They alv;ays ni;mber eigi^teen in the ve.ry youn^ Pho- 

 ronis (Spocirs, A.) ..ia ^h^-'-o is an indication of tne horae-shoe 

 arrangement which is fb una in th.e adult. (T^i^;. 56(b) ) 



The preoral. lobe does not ^ive rigg to the epistome o -f' the 



