30 



ON THE EMBRYOLOGY OF ECHINODERMS. 



CUVIERIA FABRICII Dub. et Kor. 



Figs. 35 -.38. 



Fi*. 35. Youngest Cuvieria observed, in which the tentacles of the mouth do not yet protrude beyond the 

 general outline of the pupa. 



Fig. 36. A much more advanced Cuvieria than fig. 35 ; the tentacles, g, are very prominent. 



Fig. 37. A still more advanced Cuvieria, in which the position of the madreporic body, J, can he MOD. Am- 

 bulacral tentacles, g', have also been formed. 



Fig. 38. A young Cuvieria nearly in the state of fig. 37, compressed to show the relation of the different 

 parts to each other. 





