236 



Figure 184: Stichopus japonicus. 

 Stages of transition of the auricularia into 



the doholaria. 



A, B — disappearance of preorai and anal 



lobes and change of body shape; C -^- 



young doliolaria. "Elastic" spheres situated 



under the ciliated bands. 



Doliolaria 



The larval body is barrel-shaped with four-five transverse ciliated bands. 

 All of the skeletal elements present in the auricularia are retained here (Figure 

 185). The doliolaria is smaller than the auricularia; its length sometimes 



