Plate 31. 

 1-3. Phormosoma hispidum A. Ag. 



1. Partly denuded test of a specimen measuring 75 mm., seen from the actinal side ; Station 



3392. 



2. Same as fig. 1, seen from the abactinal side. 



3. Actinal view of the denuded test of a specimen measuring 120 mm. in diameter; Station 



3376. 



All figures natural size. 



