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Puate 98. 
1-11. Nacopatagus gracilis A. Ag.; “Hassler” Exp., off 
Juan Fernandez 65 fms. 
Young specimen of 6.5 mm., seen from the actinal side. 
. Specimen 17 mm. in length, seen from the actinal side. 
The same as fig. 2, seen from the abactinal side. 
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The same as fig. 2, seen in profile facing the left posterior interambulacrum. 
. Abactinal system and surrounding plates of specimen of 6.5 mm., seen from the 
exterior. 
Abactinal system and surrounding plates of specimen 17 mm. in length, seen from the 
interior. 
Actinostome of specimen 11.5 mm. in length. 
. The second plate of the posterior zone of the left posterior ambulacrum of specimen, 6.5 
mui. in length. 
The same plate of a specimen 9 mm. in length. 
The same plate of a specimen 11 mm. in length. 
The same plate of the specimen of fig. 2, 17 mm. in length. 
