PLATE 24. 



ClTBOSPHJERIDA. 



Diam. Page 



Fig. 1. Hexacontium sceptrum, n. sp., . . . . x 400 194 



Tig. la. The two medullary shells. 



Fig. 2. Hexacontium favosum, n. sp., . . . . x 400 194 



Fig. 2a. The two medullary shells. 



Fig. 3. Hexacontium axotrias, n. sp., . . . . x 300 192 



The six lattice-plates, which form the cortical shell, are not yet fully de- 

 veloped. 



Fig. 4. Hexacontium fioridum, n. sp., . . . . . x 300 195 



Fig. 4a. The two medullary shells. 



Fig. 5. Hexacontium papillosum, n. sp., . . . x 400 197 



Fig. 5a. The two medullary shells. 



Fig. 6. Hexacontium Icevigatum, n. sp., * . . x 400 193 



The contours of the two medullary shells are visible in the centre. 



Fig. 7. Hexacontium prionacanthum, n. sp. . . . x 400 195 



Fig. 7a. The two medullary shells, connected with a fragment of the 

 cortical shell. 



Fig. 8. Cubosphcera cuhaxonia, n. sp., . . . . . x 400 203 



Fig. 8a. A single radial spine. 



Fig. 9. Hexacromyum elegans, n. sp., . . . . . x 400 201 



A part of the two cortical shells is broken off. 



