144 



CAMBKIAN BRACHIOPODA. 



Detailed stratigra'phic distribution of Cambrian and Ordovidan Brachiopoda — Continued. 

 Russia— Continued. 



Localities and species. 



TJngulite grit or Oholus saTidsfone— Continued. 



9d, 336a, 336b, 336c, 336h, 336j-u, 395, 395a-e, 395z— Continued. 



Obolus {Schmidfia) obi 

 Oholus ISchmidlia) obi 

 Obolus (Schmidtia) ob\ 

 Obolus (Schmidtia) obi 

 Obolus (Schmidtia) obi 

 Obolus (Schmidtia) obi 

 Obolus (Schmidtia) obi 

 Lingulella (Leptemboi 



-395,-395b. 



lusus acutus — 395. 



tusus ellipticus—S95, 395b. 



tusus extenuatus~SQ5 . 



tusus laius—Z95. 



tusus longus—Z9?>. 



tusus minutus~3Q5. 



Ion) Ungulaeformis — 395. 

 Helmcrsenia iddogcjisis — 336o-q . 

 Kcyserlingia buchi—^d, 336a, 336n-p, 395, 395b. 

 Schizambon? esihonia — 336h. 



Obolus coTiglomerate and sandstone below it (Schmidtia c 

 ite). 



3361, 395f-ii. 



Obolus apollinis — 395f. 



Obolus apollinis maximus — 395f. 



Obolus triangularis— SSGi, 395g, 395i. 



Obolus triangularis inornatus — 395g. 



Obolus (Schmidlia) cdatus — 395g-i, 395o, 395s-u. 



Obolus (Schmidtia) cclatus orbiculatus — 395g-r. 



Obolus (Schmidtia) cclatus prsecisus — 395g-r. 



Fucoid sandstone. 



LOWER CAMBRIAN. 



MicTcwilzia conglomerate. 



Miclcwitzia monilifera — 396q-w. 

 Mesonacis micfcwiVzi— 396r, 39Gu, 396v. 



See England, Scotland, and Wales, where the horizons are more or less closely differentiated and correlated, 

 with complete lists of localities and included species. 



South Dakota and Wyoming. 



Three of the localities (302e, 302p, and 302u) occur in the upper part of the Deadwood formation and have been 

 referred to the Upper Cambrian; the remainder (see index for numbers) occur in the Middle Cambrian at various 

 more or less closely related horizons in the Deadwood formation. (See also Montana and Wyoming.) 

 Sweden, Demnark, Finland, and Norway. 



