PLATE XLI. 



PAGE 



Hyalonema (Styloccdyx) clavigerum, F. E. S., . . 220 



Fig. 1. Fragment, preserved in alcohol ; natural size. 



Fig. 2. Vertical section of the marginal portion, with extrinsic, intruded oxyhex- 

 asters (combination figure); x 60. 



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



Fig. 4. Autodermal pentact pinulus ; x 300. 



Fig. 5. Intruded oxyhexaster, not belonging to Hyalonema {Stylocalyx) clavi- 

 gerum; X 300. 



Fig. 6. Oxydiact with terminal barbs ; x 300. 



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



Fig. 8. Autogastral pentact pinulus ; x 300. 



Fig. 9. Large amphidisc ; x 200. 



Figs. 10, 11. Small amphidiscs ; x 300. 



For " Dictyosijhsera " on the Plate read " Hyalonema (Stylocalyx)." 



