(42) 



forwara iixto tt-.o i.reoral lobe but in aiiOti'.er part of hi a paper 

 lie says, tlie ogsophat:v,s is ofteii foldea transvc r-aely (this also 

 the case in the yoi.iii^ Phorciiis) iixto pouciies and the "subJ-ieural 

 .land" is a diverticulum of its dorsal v.all, 



V/hile in examining, sections 1 nave ■f're quently foirnu a ae- 

 pression in the re^^ion tiiat Masterruan (15) indicates, 1 have 

 never -f'ound it in the livin--, larva, ■ Only in verj poorly killea 

 larva,e have I found the depression to be as deep as LiastenTan 

 i.as siiom. ai'id in all cases the structure of the vrall is practi- 

 cally liK'e that of the oesophat-uis, 



I'n the Actinotro chae Species, A, ana E. , there is no de- 

 pression in the livin:_, larva -.vnicii mit;;ht be homolOj:ji zea to the 

 subneural ^land of hi^^her animals and I am forced to aj^ree with 



Roule and Ikeda iu tiieir belief that the so-called "subneural 

 t.land" v.-hich Masterman describes ia a product of fixation. 



"O ral aiid Atria l uro oves":- (Masterman) Masterman (15) 

 has observed a mid-ventral ciliatea area leading, into tlie mouth 

 ■^rom the preoral lobe in front and a broad ciliatea area ae- 

 pressed into two oral grooves leadinfc, into it f'-om the ventral 

 surface of the collca.'- c^n.o,. Ho has also seen two oo-called 

 "atrial grooves" leadin^^ into the do rso-lateral corners o f t he 

 mout):. Masterman says ho does not find gill-slits in ^Ir. Ac- 

 tinotro ci:a nor does he find structures tnat he considers to be 



