PLATE LI. 



PAGE 



Semperella schultzei, Semper, . . .261 



Fig. ].. A specimen, preserved in alcohol ; two-thiixls natm-al size. 



Fig. 2. Hypodermal pentact ; x 20. 



Fig. 3a. Uncinatum-like oxydiact, with curved barbs ; x 20. 



Figs. 3 b, c, d. Superior, middle, and inferior part of an uncinatum-like oxydiact, 

 with curved barbs ; x 200. 



Fig. 4. Large autodermal pentact pinulus ; x 200. 



Fig. 5. Smaller but strong autodermal pentact pinulus ; x 200. 



Fig. 6. Small uncinatum-like oxydiact ; x 200. 



Fig. 7. Small amphidisc ; x 500. 



Figs. 8, 9. Middle-sized amphidiscs ; x 200. 



Fig. 10. Large amphidisc ; x 200. 



Fig. 11. Imperfect (young) middle-sized amphidisc ; x 200. 



Fig. 12. Slender middle-sized amphidisc ; x 500. 



Fig. 13. Fragment of the dermal skeleton, with some smaller autodermal pentact 

 pinuU; x 200. 



Fig. 14. Inferior part of an anchor-like spicule of the basal tuft ; x 60. 



Fig. 15. Fragment of the parenchymal skeleton ; x 200. 



Fig. 16. Part of the lateral side, outer view ; x 2. 



Fig. 17. Fragment of the dermal skeleton ; x 60. 



