PLATE 140. 



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. 



Belonaspida, Hexalaspida et Diplocontda. 



Fig. 1. Diploconus amalla, n. sp., 



Fig. 2. Diploconus hexaphyllus, n. sp. , 



Fig. 3. Diploconus cyathiscus, n. sp., 



Fig. 4. Diploconus cotyliscus, n. sp., 

 Polar view. 



Fig. 5. Diplocolpus serratus, n. sp., 



Fig. 6. Diplocolpus cristatus, n. sp., 



Fig. 7. Diplocolpus costatus, n. sp., 



Fig. 8. Diplocolpus sulcatus, n. sp., 



Fig. 9. Diplocolpus dentatus, n. sp., 



Meridional section through the centre of the shell. 



Fig. 10. Hexacolpus infundibulum, n. sp., 



Fig. 11. Hexacolpus trypanon, n. sp., 



Fig. 12. Hexaconus echinatus, n. sp., . 



Fig. 13. Coleaspis vaginata, n. sp., 



Meridional section through the shell. 



Fig. 14. Coleaspis hydrotomica, n. sp., 



Fig. 15. Hexonaspis hexapleura y n. sp., 



A single spine with its thick apophyses. 



Diam. Page 

 x 300 885 



x 300 



x 300 



x 400 



x 400 



x 400 



886 



88. 



886 





X 



300 



888 





X 



400 



887 





X 



400 



887 





X 



300 



888 





X 



300 



888 



. 



X 



300 



881 



• 



X 



300 



881 



• 



. X 



300 



878 





X 



300 



866 



867 



879 



Fig. 16. Hexonaspis hastata, n. sp., . 



x 400 



879 



