PLATE ill. 

 1-3. Echinus anchistus, sp. nov. 



1. Abactinal view of type-specimen, partly denuded. 



2. Side view of same. 



3. Actinal view of same. 



4-6. Salmacis erythracis, sp. nov. 



4. Abactinal view of type-specimen, partly denuded. 



5. Side view of same. 



6. Actinal view of same. 



7, 8. Nudechinus multicolor, comb. nov. 



7. Side view of Yoshiwara's type-specimen, partly denuded. 



8. Abactinal view of same. 



9, 10. Strongylocentrotus pulchellus A. Ag. and Cl. 



9. Side view of type-specimen, partly denuded. 

 10. Abactinal view of same. 



All figures natural size. 



