PLATE XX. 



Linopneustes longispinus A. As. 



Right half of test covered with spines from above, natural size. 

 Left half, denuded. 



m (|). 



Fig. 2, seen from the actinal side, covered with spines. 



Fig. 1, seen from thu actinal side, denuded. 



ii ci). 

 Anal system with subanal fasciole (j). 

 Marginal fasciole on the edge of the ambitus. 



