132 HAWAIIAN AND OTHEE PACIFIC ECHINI. 



The calcareous particles in the pedicels (PI. 50, fig. 21) were numerous and 

 characteristic. They are distinctly triradiate, but the branches are more or 

 less curved and often give off secondary branches. They do not, how- 

 ever, become perforated plates. 



The sphaeridia (PI. 50, fig. 20), of which several are pendent in each ambu- 

 lacrum, are variable in shape, some being nearly globular, while others are 

 much longer than thick. 



The single specimen of this species was taken by the " Albatross " at 



Station 3847. Off Lae-o Ka Laau Light, Molokai, Hawaiian Islands. 

 23-24 fathoms. S. st. 



^ I 



