SYSTEMATIC LIST OF FOSSILS. 

 LONE MOUNTAIN SILURIAN — Continued. 



825 



Genera ami species. 



Brailiiopiidu. 



Lepta'ua scrii'ta Sowerby. 

 Orthis ■. . 



CephaUipiida. 



Orthoceras sp.f . 

 Cyrtooeras sp. f. 



Pwcitopoda. 



C'craurus 



Daliiianites 



Tiiiuulfus eonceutrictis Murcb. 



Ill;inus 



Asapbus platycephalus Stokes . 



Like (). plicatella. 



DEVONIAN. 



(Abbreviations.— Up. Helil. = Pppor Heldorberg. Ham. = Hiiiiiiltoii ;;rim|i. Ch. = Cliemiins Rroup of the Devo 

 ■ies of the GeologiciU Survey of New York. H. & W.=Hall & Wliitticld, <Jim.1. Exi>1. Fiirtiuth Panillt'l, vol. iv, 1877 



