PLATE LV. 



PAGE 



Rossella antwctica, Caxter, . . .139 



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



Fig. 2. Vertical section of the outer portion of the lateral wall (combination 

 figure); x 100. 



Fig. 3. Autodermal pentact with rough rounded rays ; x 100. 



Fig. 4. Autodermal tetract with straight, rough, rounded rays; x 100. 



Fig. .5. Autogastral hexact with straight, rough, rounded rays; x 100. 



Fig. 6. Parenchymal discohexaster ; x 450. 



Fig. 7. Portion of the marginal part ; natural size. 



Fig. 8. Discohexact, perhaps extrinsic and intruded ; x 300. 



Fig. 9. Outer part of a pleural pentact prostale ; x 100. 



Fig. 10. Parenchymal diact, with four central cruciately disposed knobs, and 

 rough, rounded ends ; x 100. 



Fig. 11. Parenchymal rod-like sj)icule, with rough, rounded ends; x 100. 



Fig. 12. Inferior part of an anchor-like spicule of the basis ; x 100. 



Fig. 13. Outer view of a pleural pentact prostale ; x 100. 



Fig. 14. Discohexaster with slender perianth-like bundles of terminal rays ; x 300 



Fig. 15. Discohexaster with three terminal rays on each principal ; x 300. 



