Plate 24. 



1-8. Podophora atrata Agass. 



1. Left anterior interambulacrum of a denuded specimen measuring 8 mm. in diameter. 



2. The same interambulacrum from a denuded specimen 14 mm. in diameter. 



3. The same interambulacrum from a denuded specimen 26 mm. in diameter. 



4. The same interambulacrum from a denuded specimen 45 mm. in diameter. 



5. A primary tubercle at the ambitus, on the fifth plate from the actinal system, the de- 



nuded test measuring 45 mm. in diameter. 



6. The same, tubercle in profile. 



7. The genital and last interambulacral plates, the seventh and eighth from the actinal 



system in the left anterior interambulacrum, of a denuded specimen, measuring 

 8 mm. in diameter. 



8. The ninth and tenth plates of the left anterior interambulacrum, of a denuded test 



measuring 45 mm. in diameter. 

 Hawaiian Ids., A. Garrett Coll. 



