PLATE LXX. 



PAGE 



Hyalostylus dives, F. E. S., . . . 110 



Fig 1. A much damaged specimen, preserved in alcohol ; natural size. 



Fig. 2. Hexaster with thin terminal rays, whose exterior half consists of a 

 cylindrical Typha spike-like portion; x 450. 



Fig. 3. Discohexaster with long perianth-like situated, S shaped, terminal rays of 

 unequal lengths ; x 450. 



Fio-. 4. Dermal (hypodermal ?) hexact, whose external radial ray shows a 

 terminal club-shaped thickening ; x 300. 



Figs. 5, 8. Curved rough oxydiacts ; x 300. 



Fig. 6. Rough club-shaped end of the external radial ray of a dermal hexact ; x 

 300. 



Fig. 7. Part of a long, slightly curved diact with rough club-shaped ends ; x 300. 



Fig. 9. Portion of the ladder-like connected longitudinal spicules of the stem ; 

 x300. 



Fig. 10. Tetract with two opposite rounded and twoojDposite pointed rays ; x 300. 



Fig. 11. Discohexaster with eight rayed, inverted, bell-shaped umbels at the ends 

 of the terminal rays ; x 450. 



Fig. 12. Discohexaster with numerous long straight terminal rays ; x 450. 



