SCXPIIISIOMA, STEOBIL4., EPHTKA. 



125 



anterior part of the body, giving rise to a series of segment-like 

 divisions. The anterior part of the body bearing the tentacles is 

 first marked off; and following this a greater or less number of 

 sections, the new segments appearing continuously in the direction 

 from before backward. The hindermost or basal swollen club-shaped 

 end of the polyp's body remains undivided. The Scyphistoma h;is 



Fis.113.--f, Stage of Scyphistoma with sixteen ;;rm= (slightly magnified); GU-. gastric ridges. 



f, Commencing strobilization. 



now become the StrobHa, which itself passes through various 

 developmental phases. The tentacles abort ; the successive segments, 

 separated from each other by constrictions and provided with lobe- 

 like continuations and marginal bodies, become transformed 'into 

 small flat discs, which become separate, and, as Ephyrce, represent the 

 larva? of the Scyphomeduspe (fig. 113 b-h). 



