CNIDABIA—GASTRO-GANAL SYSTEM 



85 



the Craspedota), there are 4 interradial or 8 adradial mobile gastral 

 filaments, or, usually, tufts (phacelli) of gastral filaments, whose bases 

 define the boundary between the oesophagus and the endodermal main 

 intestine. The peripheral intestine is very variously developed. In 



Fig. 70.— CannorWza connexa, after Haeokel. A, Seen from the sutumteella ; B, from tlie 

 side ; C, from the subllmbrella, after removal of the oral arms and buccal stomach by cutting 

 through the oral pillars. D, Section in the direction of the principal axis and the line a&c in Fig. A. 

 a-i, Near an interradius ; &-c, perradius ; og, subgenital ostia ; ma, oral arm ; ps, perradial, is, inter- 

 radial sensory body ; g, gonades ; mp, ap, oral pillars, arm pillars ; jj/fc, pillar canals ; pic, perradial ; 

 ilc, interradial gastro-canal ; h-h, principal axis ; sgp, subgenital poi-ticus ; 6m, buccal stomach ; n/.-, 

 arm canal ; sm, suctorial mouths ; gc, central stomach. 



the lower Acraspeda, which also remind us of the Scyphida in their 

 attachment by an aboral stalk (Lucernaria) and their cup-like shape, 

 the peripheral intestine consists of 4 wide pouches divided by narrow 

 septa, which communicate with the chief intestine and also open into 



