VELATA 



465 





^m. 











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Fig 198.— Aboral view of Ptemster stelli/er. mars, Dorsal V.rood-pouch. 

 X U. (From Sladen.) 



Fig m.-Ol■^lyi^■^y oUIymenasterpellucidus. x 1. (From Wyville Thomson.) 



2 H 

 VOL. I 



