(46) 



"Stomaci i Divert! cul ae" ;- (Ikeaa, Loiii_^cliamps aufi Menon) 



"lio toc horajs" : - (Mastermau and RoiJlf') 



River since Jonaimos Muller (19) saw the i,c:irfia "bliiildarme" 

 iii /^ctiiiOtrocha brarichiata. nearly all o^ tliose vvno have atuaiea 

 Ac tinotroc-jiaehave observed the same structures. Some have con- 

 si deroa them to be liver diverticulae , others i-^ve described 

 tnem as dark masses with ;jlobules and as brown specks. Wilson 

 calls them ".^^and-jxar lobes of the stomach". 



lkecia(9), Lon^champs (12) and Kenon (17) speak of them as 

 "stomacn a1 vr'-'^i c"? lae" but they ao not ascribe any function to 

 them. 



llasterman (15) and Roule (J:!0) look upon them as riidimontary 

 ;xOtoci:orcls. 



Roule, Ikeda and Lonrcharops have studied larvae in v/hi ch 

 the aiverticulum was not pairea ana lateral but unpai rea ana me- 

 dio-ventral. The latter inves tij^ato r has observea larvae of 

 both types, 



1 find that in Species, A., tno diverticulum is undevelot-Cd 

 ^ven at the time of metajnorphcsis while in Species, B. , *i:'' ai- 

 verticulum is pciJ i-ea, well developea and vent ro-lateral, 



Loni:,champ3, it seems to me, has very justly ub joe tea to 

 Yasterma.n's use of the name "Diplochorda" under which tteie latter 

 incluaes tne Fho^onidae ana Cephalodiscu s. 



