XVIII 
Asteroidea. Pl 
The Voyage of H.M.S‘Challenger” 
rn Bros. imp. 
Minte: 
W.H Crowther del. et hth. 
1-4. CRASPIDASTER HESPERUS, Miller & Troschel,sp. 5-6. PENTAGONASTER ARCUATUS,n sp. 
2-10. PSEUDARCHASTER TESSELLATUS,n.sp. 
7-8. APHRODITASTER GRACILIS,n.sp 
