Plate VIII. 



licAjadrdla olcinoaeana Ij. 



Fig. 13. Large hexactin-dertnalia (prostalia marginalia) from tlie cuff-edge. 



Ehapliides adhering to the distal ray. 150 x . 

 Figs. 14-18. liexactin-dermalia of various sizes from the ledge. 1.50 x . 

 Figs. 19-20. Oxyhexasters. 300 x . 

 Fig. 21. Oxystauraster seen from side. 300 x . 

 Fig. 22. Same seen flat on. 300 x . 

 Fig. 23. Floricome. 300 x . 



Fig.=. 24—26. Intermedial microxyhexactius with .spinose rays. 300 x . 

 Figs. 27-28. Occasional intermedial spicules (canalaria ?). 1.50 x . 

 Fig. 29. Section of the edge of a parietal ledge. 100 x . 

 Fig. 30. Trabeculte, with thesocytes {th.). 440 x . 

 Fig, 31. Portion of sieve-plate beam, seen from dermal side. .50 x . 

 Figs. 32-36. Some spicules shaken out from the dead skeleton shown in 



PI. VII, fig. 3.— Fig. 32, spinose microxyhexactin (300 x ). Fig. 33, 



rare form of an intermedial hexactin (basidictyonalia H) (1.50 x ). 



Fig. 34, hasidictyonal hexactin (1.50 x ). Fig. 3.5, oxystauraster 



(300 X ). Fig. 36, reiunant of a graphiocome after loss (if terminals 



(300 X ). 

 Fig. 37. Portion of oscular memlirane. with spiiiose sjiiculcs whiuli grade over 



into micrt>xyhexactins. Fnjm a small and rather young specimen. 



JOO X. 



