On the Cretaceous Flora of Eiissian Sakhalin. 43 



and N. Jersey, also in the Raritan and possibly the Magothy too 

 of Black Island and Staten Island of the Atlantic Coast. In Green- 

 land, this species has been found in an equivalent of the Gyliakian 

 series, that is Atane. Though abundantly found in the Upper 

 Cretaceous of America and of Greenland, this species is entirely 

 wanting in Europe as well as in the Lower Cretaceous of its home. 

 This species has therefore found its end in Magothy. But P. lan- 

 ceolata Knowl.^^ was recognized in the Laramie Group of Montana. 

 The abundant occurrence of P. suhintegrifolius in Russian Sakhahn 

 as a type fossil of the Gyliakian, together with Nilssonia serotma, 

 gives us indication of the closest relation of our flora to those in 

 N. America and in Greenland, but not to any in Europe. This 

 shows very well the contemporaneity of our flora partly with the 

 European Cenomanian and partly with its Turonian. 



17. Damfnara borealis Heek. 



1841. "Seed vessels of Coniferous plants," Hitchcock, Final report Geo!. 



Massachusetts, p. 430, pi. XIX, f. 4, 5. 

 1882. Dammara borealis, Heee, Fossile Flora Grönlands, part I., p. 54, pi. 



XXYVII, f. 5. 

 1882. Dammara microlepis, Heer, Fossile Flora Grönlands, part I., p. 55, 



pi. XL, f. 5. 

 1882. Eucalyptus Geinitzii, Heer, ibidem, p. 93, pi. XLY, f. 4-9 ; pi. 



XLVI, f. 12d. 



1889. Dammara borealis, Velenovsky, Kv^etena ëeskeho Cenonianu, ]). 7, pi. 

 I, f. 28, 29. 



1890. Eucalyptus Geinitzii, White, On Cretaceous Plants from Martha's 

 Vineyard. 



1892. Dammara borealis, Hollick, The Paleontology of the Cretaceous For- 

 mation on Staten Island, p. 31, pi. I. f. 17. 

 1896. Newberry, Flora of Amboy Clays, p. 46, pi. X, f. 8. 



1) Weed and Knowlton (1893), p. 49, pi. V, f. 5. 



