The Voyage of H.M.S."Challenger” Asteroidea. P] LXXVI! 
F H.Michael del. F. Huth, bith’ Edin® 
E2ePbeRAST ER S@ELEVFER, usp) 3-4. PTERASTER RUGATUS nsp 5-6. PTERASTER SEMIRETICULATUS,n sp 
7-8. RETASTER GIBBER,nsp. 9-10.RETASTER VERRUCOSUS,nsp. Il-12.RETASTER INSIGNIS,n sp. 
