PLATE 138. 



N.B. The signification of the characters is the same in all the figures (compare p. 718). 



a. Northern polar spines. 



b. Northern tropical spines. 



c. Equatorial spines. 



d. Southern tropical spines. 



e. Southern polar spines. 



DORATASPIDA. 



Diam. Page 



Fig. 1. Costinaspis peripwa (vel Dorataspis peripora), n. sp., . x 300 826 



Fig. 2. Dorataspis fusigera, n. sp., . . . . . x 400 813 



Fig. 3. Dorataspis micropora, n. sp., . . . . x 300 815 



Fig. 4. Dorataspis typica, n. sp., . . . x 300 815 



Fig. 4a. Polar view of the central union of the twenty spines, . X 300 815 



Fig. 5. Ceriaspis inermis, n. sp., . . . . x 400 821 



Fig. G. Ceriaspis favosa, n. sp., . . . . x 400 821 







Fig. 7. Hystrichaspis fruticata, n. sp., . . . . x 300 825 



Fig. 8. Hystrichapsis pectinata, n. sp., . . . x 300 822 



Fig. 9. Hystrichaspis furcata, n. sp., . . . . x 400 822 



Fig. 10. Hystrichaspis dorsata, n. sp., . . . x 300 823 



Fig. 11. Hystrichaspis cristata (vel Siphonaspis cristata, n. sp.), . x 400 823 



