ORDER, DISORDKr.; TORSION, l)i:roRSU)N 57 



Fig. 23. Foettingeria actiniarum: tomitogcnesis. (a) Last division. 

 (b)-(g) Regression of x. y, z. Formation of the ogival and falciform 

 fields.'' Torsion, (h)-(i) The tomite. The posterior spiral roil has 

 been invaginated. (j) The rosette, formed from x' , as seen in the 



trophont. 



