PLATE 137. 



JV.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. 



Fig. 1. 

 Fig. 2. 

 Fig. 3. 



Fig. 4. 



Fig. 5. 

 Fig. 6. 



Phractaspis complanata, n. sp., 

 Phractaspis prototypus, n. sp. ? 

 Phractaspis constricta, n. sp., . 

 Pleuraspis horrida, n. sp., 

 Stauraspis stauracantha, n. sp., 

 Stauraspis stauracantha, n. sp., 



A single spine. 



Fig. 7 



Echinaspis echinoides. n. sp., . 



Fig. 8. Echinaspis echinoides, n. sp., . 

 A single spine. 



Diam. Page 

 x 400 809 



x 400 



x 400 



x 400 



x 300 



x 600 



809 



810 



811 



832 



832 



x 300 833 

 x 800 833 



Fig. 9. Coscinaspis parmipora, n. sp., 



x 400 827 



