Fig. 10 FlR. 11. 



Figs. 10 and n, from type specimens at Ke\v. 

 GEASTER PERUVIANUS. 



Fig. 12. 



Fig. 13. 



Fig. 14. 



Fig. 15. 



Fig. 16. 



Figs. 12, 13, 14, 15, and 16, from type specimens, all collected in the sand at 

 Jupiter, Florida. 



.GEASTER ARENARIUS. 



