16 JOHAN Kl^ER. [SEC. ARCT. EXP. FRAM 



This determination of age is based upon the 3 Productella forms 

 appearing in Dh. (ex. ai'f. lacrimosa GONR., arctirostrata HALL and 

 subaculeata MURCII var. latior GURICH), which MEYER considers charac- 

 teristic for Ghemung. 



Several conditions of faunistical and stratigraphical nature do not 

 support this opinion of 0. E. MEYER. 



It is of importance here to note, that MEYER has found several real 

 Middle Devonian brachiopods in Dh, e. g. Spirifer elegans STEIN, var., 

 Spirifer yrcyarius CLAPP. and Wdsonia princeps BARR., which he calls 

 "vereinzelte Reste der mitteldevonischen Fauna". 



The Middel Devonian forms have now been increased by Macropeta- 

 lichthys Sclieii. this characteristic genus until the present time having 

 been found only in the upper part of the Lower Devonian and in the 

 Middle Devonian. 



It seems to me, that the Middle Devonian character of the fauna 

 in Dh in this manner is marked so plainly, that this, zone cannot be of 

 any high Upper Devonian age (Ghemung). 



In reality, even the 3 Productella forms are not of decisive value. 

 Productella ex. aff. lacrimosa GONR. and Productella arctirostrata 

 HALL are also found in the characteristic Middle Devonian zone Dg, and 

 Productella subaculeata MURCU was known previously both from the 

 Middle Devonian and from the Upper Devonian. 



It therefore appears to me to be evident that the zone Dh, so far 

 from being parallel to Ghemung, should preferably be assigned to the 

 lower part of the Upper Devonian, or with even greater reason to the 

 transition strata between the Middle and the Upper Devonian. This view 

 is confirmed by the small extent of the strata 1 and the stratigraphical 

 results which may be deduced from the fauna in the succeeding series E. 



II. Fish Remains And Other Fossils From Series E. 



This series, which superimposes the marine series D, forms the 

 uppermost member of the Devonian. It is a continental formation, the 

 facies development of which corresponds to the Old Red facies, in the 

 state of New York (Catskill), and East Canada. In his preliminary 

 report SCHEI gives a brief survey of this series. A somewhat fuller 



1 P. SCHEI, Preliminary Report, 1903, Page 7. 



