Puate 70. 
1-5. Spatagocystis Challengeri A. Ag.; ‘‘Challenger ” Station 147. 
. Specimen 48 mm. in length, seen from the actinal side. 
The same, seen from the interior. 
The same, seen from the interior of the abactinal side. 
. Actinostome and plates surrounding the same. 
. Anal system and posterior extremity of the same. 
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