Plate X. 

 Pedicels of Spatangidae. 



The termiual piu-t of a frontal pedicel in Abatus Pliilippii I,ov. 



Half the disk of a frontal pedicel in Hemiaster expergitns Lov. 



The terminal part of a frontal pedicel in Agassizia scrobiculata V.\L. 



A quadrant of the disk of a frontal pedicel in Moira afropos Laiicik. 



The basal part of one of its larainiK. 



A part of the disk of a frontal pedicel in .^ceste bellidifera Wyv. Thoms. 



The basal part of one of its lamin;i;; side view. 



The same, seen from the under side. 



The basal part of a lamina from a frontal pedicel in Kleinia luzonica Gr.w, from the under side. 



A cjuadrant of the disk of a frontal pedicel in Schizaster fragilis Diu. A Kou. 



A part of the disk of a frontal pedicel in Schizaster japonicus Al,. Ag. 



The basal part of one of its laminae, from the under side. 



The same, from above. 



The tip of a simple frontal pedicel, in ]\Iaretia planulata L.\.mck. ; side view. • 



The same, in Metalia maculosa Gm.; side view. 



The top of a frontal pedicel in Metalia frontosa n.; seen from above. 



The same, from Lovenia elongata Gii.^v; side view. 



The same; end view. 



The same, spicular framework, in Spatangus purpureus 0. V. M.; side view. 



The tip of a simple, ventral pedicel, V, in .Moira atropos La.mck. 



The same, in Schizaster japonicus Al. Ag. 



