NAPLES FAUNA IN WESTERN NEW YORK, PART 2 377 



west on the Liard river the bituminous underlying limestones have been 

 observed. In this barely explored region and the vast territory northward 

 and west to the seaboard much more definite evidence of the migration 

 path of the Intumescens fauna is doubtless buried. 1 



Similarly throughout the immense and geologically unexplored region 

 of northern Asia we still lack all but intimations of the presence of this 

 fauna. 



In the Timan or Petschoraland of northeastern Russia, lying on the 

 Frozen sea, the fauna again blooms out in its fulness and purity, that is as 

 an ammonoid or deep littoral congeries in calcareous banks and nodules 

 interbedded with bituminous shales. 



Of such special interest is this occurrence for comparison with the New 

 York fauna that we give a brief analysis of its characteristics so far as now 

 known. The general character of this fauna was portrayed in the cele- 

 brated work of Keyserling, Wissenschaftliche Beobachtungen auf einer 

 Reise in das Petschoraland im Jahre 184.J; 1846. We have given the 

 section on page 355, but this is not as Keyserling determined it, the upper 

 sands with Spiriferdisjunctus being located by him as beneath the 

 goniatite horizon of the Domanik shale. 



Holzapfel's important treatise on the cephalopods of these Domanik 

 shales of southern Timan, 2 and the writer's memoir on the Goniatites of 

 the Naples fauna appeared almost simultaneously ; hence neither writer 



1 It may be observed here, as a counterpoise to intimations of incompleteness of evi- 

 dence bearing on these points, that, with the close of the well ordered and carefully exe- 

 cuted geological survey of New York in 1843, but a handful of species had been acquired 

 from the Portage formations of the State, too few indeed even to indicate the relationship 

 with European faunas, and the formation as a whole was characterized in the final 

 reports as one essentially barren of organic remains. Time and labor have shown the 

 imperfection of this judgment (see list of species on page 360). From the vaster Cana- 

 dian territory, so much less systematically explored in the first instance, we may rightfully 



look for proportionally greater results. — 



2 Die Cephalopoden des Domanik in siidlichen Timan: Memoires du Comite geolo- 

 gique. 1899. v. 12, no. 3, p. 1-56, pi. 1-10 



