PLATE 18. 



LlOSPH^ERIDA et ASTROSPH^ERIDA. 



Fig. 1. Centrocubus cladostylus, n. sp., 



Fig. 2. Octodendron spathillatum, n. sp., 



The entire inner shell, but a small part only of the outer shell is represented. 



Fig. 3. Octodendron cubocentron, n. sp., 



The central capsule (somewhat irregular by compression ?) exhibits a large 

 excentric nucleus (probably dislocated artificially ?). 



Fig. 4. Octodendron spathillatum, n. sp., 



Free distal end of a radial spine, with the spathillse on the end of the 

 branches. 



Rhizosphara serrata, u. sp., 



Fig. 5. 

 Fig. 6. 



Fig. 7. 



Fig. 8. 



Fig. 9. 



Rhizosphcera serrata, n. sp., 

 Medullary shell. 



(Bra serrata, n. sp., ..... 



A single radial spine. 



Plegrnosphara exodictyon, n. sp., 



The central shell-cavity encloses the spherical central capsule and the con- 

 centric nucleus. 



Spongodrymus elaphoeoccus, n. sp., .... 

 The entire inner shell, but only a small part of the outer spongy envelope is 

 represented. 



Diam. Page 



X 100 278 



x 300 280 



x 400 279 



x 800 280 



x 300 284 



x 300 284 



x 600 284 



x 200 89 



x 150 272 



