392 BULLETIN 76, UNITED STATES NATIONAL MUSEUM. 



Plate 9. 

 Fig. 1. Leplychaster anomalus; typical. ^ 



2. Leplychaster padficus; actinal surface, enlarged; station 4194. 



3. Leplychasler propinquus; type. 



4. Leplychaster arcticus; actinal surface enlarged, from off Hokushu, Japan, station 5047. 



Plate 10. Psilastcr pcclinalus. 

 Fig. 1. Abactinal surface of type. 



2. Portion of same, enlarged, ray; superomarginal plates on right. 



3. Actinal surface, enlai^ed. 



Plate 11. Dipsacastcr cximius. 



Fig. 1. Abactinal surface, typical specimen. 



2. Margin and adjacent abactinal paxillae, enlarged ; the upper end of inferomarginal plates on left. 



Plate 12. 

 Fig. 1. Dipsacaster horealis; type. 



2. Same; marginal plates and paxillse, enlarged. 



3. Dipsacasler Ixtmophihis; marginal plates and paxillae, enlarged. 



Plate 13. 

 Fig. 1. Dipsacaster horealis; actinal surface. 

 2. Dipsacasler eximius; actinal surface. 



Fig. 1. Dipsacaster eximius; portion of actinal surface, enlarged; adambulacral plates on right, infero- 

 marginals on left. 

 2. Dipsacasler horealis; same. 



Plate 1.5. Dipsacaster Ixtmophilus. 



Fig. 1. Abactinal surface of type. 

 2. Actinal surface of type. 



Plate 16. 



Fig. 1. Dipsacaster anoplus; type, abactinal surface. 



2. Same; actinal surface, enlarged. 



3. Dipsacasler eximius; young, much enlarged. 



Plate 17. 

 Fig. 1. Dy taster gilberli; type. 



2. Same; two superomarginals, enlarged. 



3. Same; abactinal paxilla, enlarged. 



4. Thrissacanthias penicillatus; young specimen, enlarged. 



Plate IS. Thrissacanthias penirillalus. 



Fig. 1. Abactinal view of type. 



2. Portion of actinal surface, enlarged, type. 



3. Inferomarginal spines, ray. 



4. Actinal surface of small specimen. 



5. Paxillse of type, enlarged. 



Plate 19. Luidia foHolata. 



Fig. 1. Abactinal view of Californian specimen, considerably less than natural size. 



2. Actinal surface of one ray. 



3. Example from Queen Charlotte Soimd, station 4203. 



