U.S. GEOLOGICAL SURVEY OF THE TERRITORIES 



PLATE XX'IIU 



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1 PTILODU-^ MEDIAEVUS 2 CATOPSALIS FOLIATUS .3-4.HYOPSODUS POWELLIANUS . 5-6 H.ACOLYTUS, 

 7-8 PELYCODUS PELVIDENS 9-lO.TRiiSODON CONIDENS . ILTRIISODON HEILPRINIANUS . 

 12 DELTATHERIUM BALDWINI 13. D.INTERRUPTUM. 14-15 PERIPTYCHUS CARINIDENS 



16-21 PANT OLE STES BRACHYSTOMUS . 



