PLate 89, 
1-4. Phrissocystis aculeata A. Ag.; Station 3366, 
1. Fragment showing the abactinal system and the surrounding plates of the abactinal 
side, 
2. Fragment of a specimen, showing the odd and the left anterior ambul 
intervening and adjoining plates, seen from the abactinal side. The fragments of 
figs. 1, 2, belong to a specimen fully as large as the one figured in Pl. 88, fig. 2. 
3. Fragment of a smaller specimen, showing 
the abactinal system somewhat more enlarged 
than fig. 1. 
4, The same, seen from the interior. 
acra, with the e 
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