PLATE XXI. 



PAGE 



Asconema setuhalense, Saville Kent., . . .116 



Fig. 1. Inferior part of a defective specimen, preserved in alcohol ; natural size. 



Fig. 2. Vertical section through the lateral wall of the specimen shown in fig. 1 

 (combination figure) ; x 30. 



Fig. 3. Small discohexaster from the trabecular framework ; x 450. 



Fig. 4. Autodermal pentact pinulus, with a rudiment of the sixth proximal radial 

 ray; x 300. 



Fig. 5. Autogastral hexact pinulus ; x 300. 



Fig. 6. Oxyhexaster from the trabecular framework ; x 450. 



Figs. 7, 8. Principal diacts with central thickening and one or two rough 

 terminal knots ; x 100. 



Figs. 9, 10. Principal oxydiacts with central thickening or four cruciately dis- 

 posed knobs ; x 100. 



Fig. 11. Discohexaster with echinated terminal rays ; x 450. 



Fig. 12. Oxyhexaster with long terminal rays ; x 450. 



