The Voyage of H.M.S.ThallengerV 



Asteroidea . PI . 



W H Crowther dri eL lilh. 



Mintenv Bros . 



1-2. PONTASTER PLANETA ,n.sp. 3-4- DYTASTER BISERIALIS,n sp. 



5-6. DYTASTER INERMIS, n sp. 7-8. PONTASTER SUBTUBERCULATUS,n sp. 



9-10. PLUTONASTER BlFRONS,Wyville.Thoinson.sp. 11-12. PLUTONASTER AMBIGUUS. , 



