PLATE 3. 



Hymenaster trias H. L. Clark. Holotype from Station 4672. X 2. 



1. Upper surface. 



2. Lower surface. 



Litonotaster tumidus H. L. Clark. Paratypes from Station 4672. X 2. 



3. Upper surface of a long-rayed specimen. 



4. Lower svu-face of same. 



5. Upper surface of a short-rayed specimen. 



6. Lower surface of same. 



