U. S. NATIONAL MUSEUM 



PROCEEDINGS, VOL. 52 PL. 10 



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COELACANTHUS EXIGUUS, PaLAEOPHICHTH YS PARVULUS, ELONICHTHYS HYPSILEPIS, 



Cladodus aculeatus, Arthrodiran plates, and Lepidotid scales. 



For explanation of plate see pages 300 and 301. 



