PLATE 25. 



CUBOSPHjERIDA. 



Diam. Page 



Fig. 1. Hexadoridium streptacanthum, n. sp., . . x 400 206 



Fig. la. The two concentric medullary shells. 



V 



Fig. 2. Hexalonche amphisiphon, n. sp., . . . . x 300 182 



Fig. 2a. Medullary shell connected with a fragment of the cortical shell 

 Fig. 2ft. Vertical section through the wall of the cortical shell. (Below 

 the centre of the Plate, also lettered 3o by mistake.) 



Fig. 3. Hexalonche rosetta, n. sp., . . . . x 400 180 



Fig. 3a. Medullary shell. 



Fig. 3ft. Vertical section through the wall of the cortical shell. 



Fig. 4. Hexalonche curvicornis, n. sp., . . . x 300 181 



Outer shell not yet complete, or partly broken off (1). 



Fig. 5. Hexalonche anaximenis, n. sp., . . . x 400 183 



Fig. 6. Hexalonche hystricina, n. sp., . . . . x 300 187 



Fig. 7. Hexacontium circumtextum, n. sp., . . . x 400 193 



Fig 7o. Vertical section through the double wall of the cortical shell. 



Fig. 8. Hexacontium gladiatum, n. sp., . . . . x 400 198 



A part of the two outer shells and of the radial spines is broken off. 



