PLATE LVI. 



PAGE 



Acanthaseus grossidaria, ¥. 'Ei. ^., . . .145 



Fig. 1. A specimen, preserved in alcohol ; natural size. 



Fig. 2. Vertical section of the marginal portion ; x 30. 



Fig. .3. Discohexaster with perianth-like bundles of terminal rays ; x 300. 



Fig. 4. Terminal rays of a discohexaster shown in fig. 3 ; x 1000. 



Fig. 5. Autodermal tetract with straight, somewhat rougli, rounded rays; x 100. 



Fig. 6. Autodermal pentact with straight, somewhat rough, rounded rays ; 

 xlOO. 



Figs. 7,8. Oxyhexaster with long, straight, smooth, terminal rays ; x 300. 



Fig. 9. Small discohexaster with three to four spined terminal rays ; x 450. 



Fig. 10. Small discohexaster with much spined terminal rays ; x 450. 



Fig. 11. Terminal expansion of a principal ray, with the terminals situated on the 

 disc ; X 1000. 



Fig. 12. Autogastral hexact with somewhat rough, pointed rays ; x 100. 



