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Fig. 1. 



a 



2. 



Plate 5. 



Caulophacus schuhei. Spinose discohexact with some bifid rays (Disco hemi- 



hexaster of Schulze) ; x 250. 



" H Discohexaster; a complete ray showing lateral branches ; 



x 250. 







'■ 



i 



I 





■ 



" 3. 

 " 4. 



" 5. 



" 6. 



Discohexaster ; x 250. 



Spinose discohemihexaster that nearly reaches condition 

 of perfect discohexaster ; x 250. 



Spinose discohemihexaster ; centrum and one principal 

 rav with its branches : x 250. 



Discohexaster; centrum and one complete ray; x 250. 



" 7. Caulophacus, sp. Stalk attached to root spicules of Ilyalonema. From a photo- 

 graph ; \. 



* 



" 8. Caulophacus schuhei. Discohexaster ; a complete ray, showing asymmetrical 



base on which the terminals rest; x 250. 



Spinose discohemihexaster ; x 250. 



E-adial section through body showing skeletal arrange- 

 ment. Thickness of section permits only larger spaces 

 to be seen. Gastral surface uppermost ; x 20. 





" 9. 

 " 10. 



U 



(C 



it 



U 







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; 

 ; 



" 11. Batkvdorus lev/is spinosus. From a photograph ; \. 



" 12. 

 " 13. 



u 



a 



a 



u 



u 



u 



Oxyhexaster; x 300. 

 Stauracts ; x 300. 



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