Plate 88. 

 1-5. Phrissocystis aciileata A. Ag. ; Station 3366. 



1. Fragments of specimen 120 mm. in length, seen from the abactinal side, show. 



parts of the left anterior interambulacrum and ambulacrum, and of the left poster 

 ambulacrum and odd interambulacrum with a few adjoining plates on either side 



2. Fragment of a somewhat larger specimen, showing the greater part of the ami 



plates of the left anterior portion of the test, seen from the abactinal side. 



3. Fragment showing a few plates of the odd anterior ambulacrum near the ambitus, f- 



from the interior. 



4. Fragment showing the actinostome, seen from the actinal side. 



5. Fragment showing the anal extremity in profile; 3-5 are fragments of a specimen ab 



120 mm. in length. 



