re Voyage of H.M.S.Challenger” 
Asteroidea. Pl. XIII. 
Mmtern Bros. imp. 
(-2. PONTASTER PLANETA ,n.sp. 3-4-DYTASTER BISERIALIS,n sp. 
5-6. DYTASTER INERMIS, nsp. 7-8. PONTASTER SUBTUBERCULATUS,n sp 
9-10. PLUTONASTER BIFRONS, Wyville lhomson,sp. I-12. PLUTONASTER AMBIGUUS,n sp. 
