(36) 



plainly vi sibl e. 



7/hen tl:e larva of Phoronio arcnitecta has five paird q-^' ten- 

 tacles {'^ic,22) the trunk rej^ion is elonL,ateci considerably ana 

 constitutes about one half the leni:th of the larva. In fact, 

 the. larva at tn i,s stage looks much like th.e -^lly aevs-lopea 

 Actinotrocha, The "retractors" described by Ikeda (9) are noT.7 

 present and the body wall in the anal rei-;ion shows a Uiickeninj 

 which is to become ti^e perianal ciliated band. Thd a larva shows 

 clearly tne presei^ce o ^ t vro ii^senteries. 



In the larva v;i th six pairs of teijtacles (Fig.3o) all of 

 the orgar^s of the fully developea Actinotrocha are present. 

 The ventraj pouch bCj^ins to invaginate ("Pig.Si^) and sections 

 usually snow tia,t tlie blood corpuscle masses are formi-ng, 

 "i^ully Developed Actinotrocha. 



There are two species of Act inot ro chae found in the v/aters 

 of Eeaufort harbor aifid they a,re very similar if not identical 

 with the two species tnat E. E. V/ilson (24) observed in Chesa- 

 peake Bay. From the latter part of May until tne latter part 

 0+' SepteiTiber both species are fairly abundant in Ui.e tow. 



V/ilson has aesignated the t v/o species found in Chesapeake 

 Bay as Species, A., arid Species, B, , and because of the general 

 agreement betv/een my observations and his descriptions I shall 

 speak of ti:e Eeaufort ^c ti no t ro chae as Species, A. and E. 



