553 



xvi ECHINODERMATA 



tentacles protruded, and the young Crinoid begins to feed. The 



az.f 



FIG. 408. Fixed larva of Anti'ilmi rnnnci'ii in which the vestibule is open Vint in which 

 no trace of the arms has yet appeared. (After Carpenter.) 



Letters as in previous li^uirs. .,>.<, si-iisc-ui xaii mi tcntai/lc. 



outer wall of the vestibule splits into five valves (r.v, Fig. 408), each 



