Fig. 1 . Side view. 



Fig. 2. A distal pinnule, 



Fig. 3. A lower pinnule, 



PLATE XVII 1. 



Fio-s. i-:3. Antedon alternata. n. sp. 



° Diam. Page 



. X 6 179 



. x 10 179 



x 10 179 



Figs. 4, 5. Antedon incerta, n. sp., . . x - 



Fig. 4. Side view, showing the absence of the second radial in one ray. . . 106 



Fig. 5. Another aspect of the same individual, ■• 



101 



