275 



Liospira amrricaiis (Hillings). 

 lAospiru docens (Hillings). 

 lAoHpua protjnc (liilliiis;s). 



Lophnspini hic'nu-lti (Il:ilh. 

 Miiclio-ilix iiiiifiinis I.csuriir. 

 Xdinio khifistoncnxin Wliilcii vcs. 

 Orthix fricoKirid ('oiirad. 

 I'ifniodcind .si(h(tc(ii(tit(i (Conrad). 

 /'t(ri/(/nin(i(tpi(s Inxixti ( San'onl ) . 

 Stroph(»mcna iiiciirr<il>i (Slicpanl ) . 

 Tctradium syrinfioporoidcH I'Irkli. 



Of these twenty species, ten occur in the divisions of the Stones Kiver 

 in Tennessee. Ostracods are abundant throughout the formation, and gas- 

 tropods, cephalopods, corals, and trilobites are common in the lower part. 



A iiebbly ecuglomerate and sandstone occurs at the base of the Pamelia 

 and extends northward beyond the limit of the limestone into Canada, 

 where it is named Rideau sandstone. 



Near L'Original, Canada," the following species have been collected from 

 limestones that are equivalent in age to the Pamelia of New York : 



Lcperditia amygaUna Jones. 



Lrpcrditia bal third primdcvd Jones. 



Lcpcrditid fahnllics Conrad.- 



Liospmi docens (Billings). 



Liospira prognc (Billings). 



l^anno kingstonensis Whiteaves. 



STRATIGRAPHIC CORRELATIONS. 



The sea in which the Stones River beds of the interior area 

 of North America were deposited is designated as the Gulf of 

 Mexico Embayment\ It came in from the south, spreading from 

 the Gulf of Mexico region to Oklahoma and central Tennessee during the 

 early Stones River time where the Simpson formation and the Tennessee 

 limestone of that age were respectively deposited. The embayment spread 

 northward into Kentucky and covered central New York and southern Can- 

 ada during the Lebanon time. The ba.sal conghmierate at the bottom of the 

 Pamelia (the New York deposit), the thinness of that formation, its 

 increasing near-shore facies as it is traced northward into Canada, its 

 apparent conformity beneath the lower Chambersburg beds of Valcour age 

 in Pennsylvania, and the numerous fossils which it contains that are 

 similar to the upi>er Stones River fossils of Tennessee, has led to the cor- 

 relation of the Pamelia with the Lebanon beds, by Ulrich. 



The Appalachian and Champlain troughs had direct connections with 

 the Atlantic and the faunas of the one mingled freely with the other, but 

 the marked differences of the faunas of the interior basin suggest the ex- 

 istence of a barrier separating the eastern and interior Chazyan seas. Cush- 



'St'ii Paloographic Maps, pages 305-307. 



