a 
Oe 
PLATE B. 
Phormosoma hispidum A. Ag.; 54 mm. in length, seen from the actinal side, natural 
size; Station 3376. 
Pourtalesia Tanneri A. Ag.; 17 mm. in length, seen in profile; Station 3431, 
Cystechinus Loveni A. Ag.; 88 mm. in length, seen facing the right anterior lateral 
ambulacrum, natural size ; Station 3415. 
