The Voyage of H.M.S."Challenger 



iroidea 



!* H Wjctael cle] et 



1-2. PLUTONASTER MARGINATUS. 

 5-6. PLUTONASTER N OTATUS, n.sp. 



3-4. PLUTONASTER RIGlDUS.n.sp 

 7-11. PHOXASTER PUMILUS,.-. sp. 



