Fig. 
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Fig. 
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Fig. 
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Fig. 
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Fig. 
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Fig. 
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Fig. 
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Fig. 
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PLATE XX. 
liinopneustes longispinus A. Ag. 
Right half of test covered with spines from above, natural size. 
Left half, denuded. 
Abactinal system (|). 
Same as Fig. 2, seen from the actinal side, covered with spines. 
Same as Fig. 1, seen from the actinal side, denuded. 
Actinal system (f ). 
Anal system with subanal fasciole (|). 
Marginal fasciole on the edge of the ambitus. 
