Explanation of the Plates. 



Plate I. 



R. Perrier from stat. 88, ab- Fig. 



Fig. 1. Mesothuria maroccana, 



actinal view. 

 2, 3. Deima atlanticum, Herouard from stat. 48. 2 actinal view, „ 2 — 4. 



3 abactinal view. 

 4 — 6. Peniagone ferruginea, n. sp. from stat. 48. 4 actinal 



view, 5 from the right side, 6 abactinal view. „ 5 — 8. 



Plate IV. 



Benthopecten spinosus, Verrill from stat. 101. abacti- 

 nal view. 



Plutonaster agassizi, Verrill from stat. 70. 2 actinal 

 view, 3 abactinal view, 4 adambulacral and marginal 

 plates from middle portion of arms. 

 Dorigone arenata, Edv. Perrier from stat. 21. 5 ab- 

 actinal view, 6 actinal view, 7 adambulacral plates, 8 two 

 pair of marginal plates with pedicellariae from the inter- 

 brachial arc. 



Plate II. 



Fig. 1, 2. Oneirophanta mutabilis, Theel from stat. 10. 1 abactinal 

 view, 2 actinal view. 



Fig. 1, 2, 



3—5. 



6, 7. 



Plate III. 



35. 1 



Benthodytes glutinosa, R. Perrier from stat. 



actinal view, 2 abactinal view. 



Peniagone wyvilli, Theel from stat. 10. 3 actinal view, 



4 from left side, 5 abactinal view. 



Benthodytes typica, Theel from stat. 53. 6 abactinal 



view, 7 actinal view. 



Plate V. 



Fig. 1. Astrogonium fallax, Ed. Perrier from stat. 70. Adambu- 



lacral- and marginal plates from middle portion of arms. 

 2 — 4. Solaster abyssicola, Verrill from stat. 88. 2 abactinal 

 view, 3 adambulacral papilla; from middle portion of 

 arms, 4 skeleton from abactinal surface. 

 5. Solaster endeca, Retzius from Bergen. Skeleton from 

 abactinal surface, 

 6, 7. Pteraster reductus, Koehler from stat. 53. 6 abactinal 

 view, 7 actinal view. 

 , 8 — 10. Ophiomusium lymani, Wyville Thomson from stat. 70. 

 Abactinal view. 8 disc-diameter 2 mm, 9 disc-diameter 

 4 mm., 10 disc-diameter 5 mm. 

 „ 11 — 12. Hemiaster expergitus, Loven from stat. 88. 11 ab- 

 actinal view, 12 actinal view. 



