M. F. LINDER, DEL. 



Specimens from Spanish Wells. 



Fig. 1. DiADKMA SETOSUM (Gray), showing- natural disposition of spines. 



Fig. 2. IsoPHYLLiA niPSACEA. Dana. 



Fig-. 2<7. Nematocyst, showing coiled thread. 



Fig-. 2i>. Nematocyst, showing thread partly extruded. 



Fig. 2r. Nematocyst, showing- thread entirely extruded. 



Tig- 2i/. End of thread, showing barb. 



