PLATE XXXIII. 



PAGE 



Figs. 1-7. Hyalonema pocuhim, F. E. S., . . 208 



Fig. 1. A specimen, much damaged at the lower part, preserved in alcohol ; 

 natural size. 



Fig. 2. Vertical section of the marginal portion of the specimen shown in fig. 1 

 (combination figure); x 25. 



Fig. 3. Marginal diact with four cruciately disposed pointed central knobs ; x 300. 



Fig. 4. Great amphidisc with four cruciately disposed central knobs on the axial 

 beam; x 100. 



Fig. 5. Small amphidisc ; x 300. 



Fig. 6. Autodermal pentact pinulus ; x 300. 



Fig. 7. Oxyhexact with straight rough rays ; x 300. 



Yigs. 8-15. Hyalonema conus,¥.E. 8.,. . . 209 



Fig. 8. A specimen without the basal tuft, preserved in alcohol ; natural size. 



Fig. 9. Great amphidisc with four cruciately disposed central knolls at the 

 axial beam ; x 300. 



Fig. 10. Inferior part of an anchor-like spicule of the basal tuft ; x 100. 



Figs. 11, 12. Middle-sized amphidiscs ; x 300. 



Fig. 13. Small amphidisc ; x 300. 



Fig. 14. Autodermal pentact pinulus, from the sieve-plate; x 100. 



Fig. 15. Autodermal pentact pinulus, from the lateral side ; x 100. 



