Fig P6 -Obelia SP. A, portion of a colony with certain parts shown in longitudinal |eot on, 

 B medusa ;C the same with reversed umhrella ; D, the same, oral aspect ^ . -Bd- J. ^. .t""-!? • 

 to Sostyk; m. ocenoaarc ; cct. ectoderm; end. endodenn; eirf. enteric cavity , |.a 

 gonothtca; Wi hydrotheca; 'i, lithocyst; m.6d medusa-bud; mnt. •»^" V ■ ?entS ■ 

 mesogloea; ma mouth; j). perisarc; P. 1, 2, S, polypes ; r»<i. c. radial caual, t. tentacle, 

 vl. velum. 



