C. Schuchert — Russian Carboniferous and Permian. 37 



the Salt Range is a problem that still needs a final solution. 

 Paralleling it with the upper horizon of the Upper Productus- 

 limestone, the correlation is primarily based on the identity 

 of Medlicottia wynnei Waag. of the Salt Range with M. 

 dalailamoB Diener, which Kraift (A. v. Krafft, Ueber d. perm. 

 Alter d. Otoceras-stufe des Himalaya. Centralbl. f. Min., 

 Geol. u. Pal., 1901, pp. 275-279) says represent but one 

 species. However, as Waagen's original specimen is, accord- 

 ing to Krafft, very badly preserved, this stated identity 

 requires better material for its proof. It is all the more neces- 

 sary to be careful, because in the Artinsk beds of Russia were 

 found Medlicottias that much remind one of M. wynnei 

 Waagen. In any event, before the correlations of Noetling 

 (Neues Jahrb., Beil. — Bd. XIV, table facing p. 468) can be 

 accepted it is necessary to prove an uninterrupted paleonto- 

 logical connection from the zone with Cyclolobus oldha?ni and 

 Hemiaspis carbonarius to the beds with Otoceras woodwardi" 

 (p. 727. See Noetling's recent work on the Otoceras beds of 

 the Himalaya here reviewed). 



Tschernyschew states that until the entire Permo-Carbonif- 

 erous fauna of Russia is worked ont, no positive correlation 

 can be made, but for the present the equivalent as presented in 

 the following table is the most probable (p. 728) : — 



Upper Pro- 

 ductus-lime- 

 stone 



Salt Eange 



Chideru beds 

 Jabi beds 

 Khund-Ghat beds 



Chideru of 

 Noetling 



Middle Pro- 

 ductus-lime- 

 stone 



Kalabagh beds 

 Virgal beds 

 Katta beds 



Virgal of 

 Noetlinpf 



Lower Pro- I . , , n ,. TTT 

 ductus-lime- i Amb .^ ds ° f Waagen 

 stone and Noetll «g 



Warchabeds (Speckled 

 sand and Lavender 

 clay) 



Dandote beds 



Talchir bed (Bowlder 

 clay) 



Ural and Tim an 



Lower Permian of European 

 Russia 



Limestone-dolomite horizon 

 CPc and Artinsk beds CPg 



Schwagerina zone, 50 to 60 

 meters 



Cora zone, 70 to 100 meters 



Omphalotrochus zone ) 60 to 70 

 Spirifer marcoui zone ) meters 



Middle Carbon with Spirifer 

 ^^ mosquensis of the east 

 \^ slope of Urals 



Conglomerate ^\^ 

 and breccia of east""\^ 

 slope of Urals ^^ 



