Plate 46. 



1-7. Phormosoraa hispidtira A. Ag. 



1. The lantern in place with the imbricating plates adjoining the actinal system, seen from 



tlie interior of specimen 203 mm. in diameter ; Station 3413. 



2. The same as fig. 1, seen somewhat in profile. 



3. Compass seen in profile. 



4. The same as fig. 3, seen from above. 



5. Primordial plate in the right anterior interambulacrum, of young specimen 15 mm. in 



diameter ; Station 3362. 



6. The madreporic genital showing three madreporic openings of same specimen as fig. 5. 



7. The last interambulacral plate of the right anterior interambulacrum, to show the first 



trace of a primary tubercle of same specimen as fig. 5. 



i 



