0. A. Heeds — Ifunton Formation of Oklahoma. 267 

 Table II. 



The widely-ranging species of the 

 Chimneyhill, Henri/house, Haragan 

 and JBois d'Arc formations, Ar- 

 buckle Mountains, Oklahoma. 



Silurian 



Chimneyhill 

 limestone 



o a 



a t. 



o 1J 



B 8 



o a 



cS 



'o 

 « 



Devonian 



w 



Spongia 

 Hindia sphceroidalis 



Anthozoa 



Enter olasma ivaynense 



Favosites conicus 



Favosites favosus 



Michelinia lenticularis 



Crinoidea 

 Cam arocrinus ulrichi 



Beachiopoda 



Anastrophia verneuili 



Anoplotheca concava 



Atrypa reticularis 



Cyrtina dalmani 



Delthyris perlamellosus 



Leptwna rhomboidalis 



Leptcenisca concava .. 



Meristella atoka 



Nucleospira ventricosa 



Plectambonites transversalis . 



Rhipidomella emarginata 



Rhipidomella oblata 



Rhynchospira formosa 



Schuchertella icoolworthanus 



Strophonella punctulifera 



Uncinnlus nucleolata 



Gastropoda 

 Platystoma niagarensis 



Crustacea 



Phacops Jiudsonicus 



Dalmanites pleuropteryx 



