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PROCEEDINGS OF THE NATIONAL MUSEUM vol. iie 



supraneura! 



spine of 

 vertebra 



centrum 



la feral process ' 

 of centrum 2 



" transformator process 



OS suspensorium 

 pleural rib 



centrum 4 



pleural rib' 



Figure 9. — Weberian apparatus of Poecilobrycon harrisoni (lateral view). 



