PLATE 136. 



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. 



DOEATASPIDA et BELONASPIDA. 



Fig. 1. Tessaraspis arachnoides, n. sp 



Fig. 2. Icosaspis tabulate/,, n. sp., 



Fig. 3. Icosaspis icosastaura, n. sp 



Fig. 4. Icosaspis elegans, n. sp., 



Fig. 5. Tessaraspis concreta, n. sp. 



Fig. 6. Phatnaspis cristata, n. sp., 



Fig. 7. Phatnaspis haliommidium, n. sp 



Central capsule within the shell— outline. 



Fig. 8. Coscinaspis polypora, n. sp., . 

 A single lattice-plate of the shell. 



Fig. 9. Phatnaspis lacunaria, n. sp., . 





Diam. 



Page 



)., . . . X 



300 



836 



X 



200 



843 



X 



400 



846 



. X 



300 



844 



X 



400 



838 



X 



400 



869 



sp., . . . .x 



200 



871 



x 300 



x 400 



827 



869 



