EXPLANATION OF PLATE III. 



Figs. 1-13. Hyalonema indicuw laccadivense . F. E. Sch. 



Fig. 1. The only known specimen. Nat. size. 



Fig. 2. Arrangement of the spicules in a section vertical to the surface. 

 X 6§ (combined figure). 



Fig. 3. Dermal macramphidisc. x 300. 



Figs. 4 and 5. Canalar mesamphidiscs. x 800. 



Figs. 6 and 7. Dermal micramphidiscs. x 300. 



Fig. 8. Terminal disc of a macramphidisc seen from within. x 300. 



Fig. 9. Dermal pinule. x 300. 



Fig. 10. Pinule of the oscular sieve-plate. x 300. 



Fig. 11. Micro-oxystauractine of the canal-wall. x 300. 



Fig. 12. Parenchymal micro-oxyhexactine. x 300. 



Fig. 13. Micro-oxypentactine of the canal- wall. x 300. 



Figs. 14-18. Hyalonema, heymonsi. F. E. Sch. 

 Fig. 14. The only known specimen. Nat. size. 



Fig. 15. Arrangement of the spicules in a section vertical to the surface. 

 X 50 (combined figure). 



Fig. 16. Dermal macramphidisc. x 300. 



Fig. 17. Micro-oxyhexactine. x 300. 



Fig. 18. Dermal pinule. x 300. 



