120 UNITED STATES NATIONAL MUSEUM BULLETIN 251 



Figure il.—Eudistoma laysani (Sluiter) : a, colony from the Palau Islands; b, right side 

 of thorax; c, right side of abdomen; d, first and second stigmatal rows on left side; e, 

 stomach, hind stomach, and midintestine;/, embryo, right side. 



