PLATE X. 



Mediaster brachiatus. 



103. End of au arm of the larger specimen, denuded, x <>. 



104. Paxilla. x 7. 



155. Madrajwrite. The upper side is the outer, x 7. 



Johannaster giganteus. 



156. Abactinal view, x 0.3. 



157. Actinal vieAv. x 0.3. 



158. Mouth-plates. R = 338mm. x 3.5. 



159. T«'elfth adambulacral and adjoining ventrolateral plates. R,= 



338 mm. The uj^per side is the adc-entral end. x 4. 



160. Valve of a large pedicellaria from the adcentral «ind of an 



adambulacral plate. R = 3.38 mm. x 90. 



161. Pedicellaria valve from a ventrolateral [)late adjoining an 



adambulacral. 11 = 338 mm. x 90. 



162. Pedicellaria valve from an abactinal plate in papular area. 



R=338mm. x 90. 



163. Ditto. Pt = 338mm. x 90. 



