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PLATE 21a. 
1-8. Podophora atrata Agass. 
Specimen with club-shaped primary radioles, seen from the actinal side. 
The same as fig. 1, seen from the abactinal side. ~ 
The same seen in profile facing the odd posterior interambulacrum. 
The odd anterior ambulacrum is at the top of figures 1 and 2. 
This specimen measures 92 mm., and was collected at Mauritius. 
