Mi .IMHAN Kir.lJ. [SEC. ARCT. EXP. FRAM 



This determination of ;i-t- i- based upon the 3 /'rodncfclln form- 

 appearm.- in Dh. (ex. at't'. lucrhnosa CONK., urctirostrata HALL and 

 Subaculeatd MuRCB \ar. lafinr Ci'mcm. which MIVKII considers charac- 

 leri-tic for ChemuiiL;. 



Several condition.- of faunistical ami stratigraphical nature do not 

 -upport tin- opinion of 0. I 1 !. MI.YF.U. 



It i- of importance here to note, thai MKM-:I: has found several real 

 Middle Devonian brachiopods in Dh. e. g. Spirifer el<'</<nis STEIN, var.. 

 .^/i/rifcr 1/ri'fjurinx ('.I.AIM-. and \Vilnoniii />ri>i<'<'/>x I>AKK.. which in- call- 

 \('iTin/.cllt' !{>)( dcr mitteldevonischen l-'auna". 



The Middel Devonian forms have now heen increa> j d hv Macropetft- 

 lirlit.liiix .^elicit, this characteristic ^cnns until the present time having 

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

 Middle Dexonian. 



11 >rems 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 hi^h Upper Devonian age (Chemungi. 



In reality, even the 3 Prodnctella form- are not of decisive value. 

 ProiliK-i'-lla ex. aff. lacrimosa CONR. and Productella (trctirostrata 

 ll\i.i are al-o found in the characteristic Middle Devonian zone Dg, and 

 Pro'/ii'-li'll'i xiihaculeata MUR<.:H was known previously hoth from the 

 Middle Devonian and from the Upper Devonian. 



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

 from heiu- parallel to Chemung, should preferably be assigned to the 

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

 transition -trala between the Middle and the Upper Devonian. This view 

 i- confirmed by the small extent of the strata ' and the stratigraphical 

 iv-iilt- which mav be deduced from the fauna in the succeeding series E. 



II. Fish Remains And Other Fossils From Series E. 



Tin- -erie.-. which -upenmposes the marine series D. forms the 

 iippermo.-l member of the Devonian. It is a continental formation, the 

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

 -late of Me\\ York (CaUkill). and I'lasl Canada. In his preliminary 

 report Sciin gi\e- a brief survey of this series. A somewhat fuller 



1'. s Preliminary liV|nn-i. I'.MI:;. 



