PLATE 134. 



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. 



Fig. 



4 



Fig. 



5 



Fig. 



6 



Fig. 



7 



X 



800 



834 



X 



400 



831 



X 



400 



841 



X 



400 



841 



Fig. 1. Dodecaspis tricincta, n. sp., . . . . x 400 834 



The enclosed central capsule contains numerous spherical nuclei. 



Fig. 2, Lychnaspis minima, n. sp., . . . . . x 400 841 



Six-sided basal pyramid of an equatorial spine, with the leaf-cross, seen 

 from the centre. 



Fig. 3. Zonaspis cingulata, n. sp., . . . x 400 834 



Equatorial section through the central capsule, n, nuclei; g, yellow 

 bodies (intracapsular xanthellae). 



Zonaspis cingulata, n. sp., 



Central pyramidal base of an equatorial spine, with the leaf-cross. 



Stauraspis cruciata, n. sp., . 



Central union of the radial spines, three polar spines being taken off. 



1/ychnaspis longissima, n. sp., 



Lychnaspis minima, n. sp., . 



Five-sided basal pyramid of a tropical spine, with the leaf-cross, seen from 

 the centre. 



Fig. 8. Lychnaspis minima, n. sp., . . . . . x 400 841 



Six-sided basal pyramid of a polar spine, with the leaf-cross, seen from 

 the centre. 



Fig. 9. Icosaspis elegans, n. sp., 

 An isolated polar plate. 



Fig. 10 Icosaspis cruciata, n. sp., . 



An isolated equatorial plate. 



Figs. 11, 12. Dorataspis species, 



Diagram of the composition of the shell of twenty 



central union of the basal leaf-cross). 

 Kg. 11. Oblique equatorial aspect. 

 Fig. 12. Accurate polar aspect (compare p. 804, 805) 



Fig. 13. Coscinaspis isopora, n. sp., . 



An isolated equatorial plate (with two aspinal and six coronal pores) 



Fig. 14. Coscinaspis isopora, n. sp., . 



Two isolated tropical plates (b, northern ; d, southern), each with two 

 aspinal and five coronal pores). 



Fig. 15. Diporaspis ncphropora, n. sp., 



Fig. 16. Acontaspis hastata, n. sp., 





X 



400 



844 





X 



400 



844 



(and also of the 



X 



100 





onal pores). 



X 



400 



828 



, each with two 



X 



400 



828 





X 



400 



816 





X 



400 



829 



