f 



Plate 12 ». 



Parts of large globiferous pedicellariae of Dorocidaris ; only the tips of the valves have 

 been drawn, as the bases are more or less alike and no claim has been made that they 

 afford generic characters, x 70. 



1-5. Dorocidaris abyssicola A. kg. 



All the figures are from a single individual, and show the great diversity in the large 

 globiferous pedicellariae. 



6-ir,. Dorocidaris Bartletti A. Ag. 



Figures 6-11 are from a single individual and show the extraordinary diversity which is 

 exhibited by the large globiferous pedioellarifE of this species. The usual form is that 

 shown in fig. 10 but the kind shown in fig. 7 is quite common. 



Figur(!S 12 and 13 are from a second individual and. show that the '' limb " on the stalk 

 may be either present or wanting. 



