. Fragment showing part 0 
near the ambitus on the abactinal side. 
PLATE 90. 
4-4. Phrissocystis aculeata A. Ag.; Station 3366. 
Fragment showing the odd posterior interambulacrum and adjoi 
. The left posterior ambulacrum and adjoining plates (fragment) 
Fragment showing the anal system with surrounding plate 
posterior ambulacrum. 
ning plates. 
s and part of the left 
f the odd posterior interambulacrum and adjoining plates 
