PLATE 135. 



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. 



Sph^erocapsida et Dorataspida. 





Diam. 



Page 



X 



300 



846 



X 



400 



841 



X 



400 



839 



X 



400 



841 



X 



300 



834 



X 



150 



798 



Fig. 1. Hylaspis serrulata, n. sp., . 



Fig. 2. Lychnaspis undulata, n. sp., . 



Fig. 3. Lychnaspis giltschii, n. sp., . 



The spherical central capsule is enclosed in the shell. 



Fig. 4. Lychnaspis rottenburgii, n. sp., 



Fig. 5. Zonaspis cequatorialis, n. sp., 



Fig. 6. Sphcerocapsa cruciata, n. sp., 



The entire shell, with its twenty cruciate perspinal holes. 



Fig. 7. Sphcerocapsa cruciata, n. sp., . . . x 800 798 



Insertion of one spine in the cruciate perspinal hole of the shell. 



Fig. 8. Sphcerocapsa quadrata, n. sp., . . . x 800 798 



A group of pores and dimples in the shell surface. 



Fig. 9. Sphcerocapsa dentata, n. sp., . . . . x 800 798 



Insertion of one spine in the cruciate perspinal hole of the shell. 



Fig. 10. Sphcerocapsa pavimentata, n. sp., . . x 800 798 



Insertion of one spine in the perspinal hole of the shell, which is composed 

 of four cruciate aspinal holes and surrounded by a group of dimples 

 and pores. 



