44 



CONTRIBUTIONS TO GENERAL GEOLOGY, 1913. 



intimate association with niarino shells reiiarded l)y tliese authors as the equivalent of the 

 CalJovian of European standards, or the ujiper part of tlie Lower Oolite of English geologists. 

 The last Alaskan locality to he mentioned is Ilerendeen Bay, which has yielded a single species 

 of Pterophylhun. 



Tlie onlv other inij)ortant Nortii .Viueriean localities are those in Oregon and California, 

 wliich together have afforded 101 forms. The collections from these localities are especially 

 rich in forms of Cladophlebis, Tjeniopteris, Sagenopteris, Xilsonia, Pterophyllum, Ctenis, 

 Ctenoi)hyllum, Podozamites, and Ginkgo. No less than 47 per cent of these species are found 

 also in Jurassic beds in other parts of the world, notably in Alaska, eastern Siberia, and York- 

 shire. England. 



The areas geographically nearest to the Alaskan localities are those of eastern Siberia. In 

 1876 Heer pubhshed liis first paper on the flora of these areas, which included material from 

 Kajamundung, Fst-Bali, the upper Amur River, and Bureja. Tliis was supplemented in later 

 years hy the study of further material from the original localities as well as from Lena Delta, 

 etc. The total number of species finally aggregated about 100, and many of them hiave since 

 been identified in mdely scattered parts of the world, the greatest number being common to 

 the beds in Oregon and California and in 'i'orkshire, England. 



As a complete enumeration of the Jurassic floras of the world is impossible for lack of space 

 in the present connection, the following list of loc-alities may be given as a partial indication 

 of their wide range: 



United States: 



South Dakota. 



Wyoming. 



California. 



Oregon. 

 Alaska: 



Cape LLsljume. 



Xpar ^Vain^v^ight Inlet. 



Nikolai. 



Cook Inlet. 



Ilerendocn Bay. 

 England: Yorkshire. 

 Scotland: SuUierland. 

 Frajice: ifammers. 

 Germany: 



I'ranco-.Swaljian area. 



-Xortheiustem area. 

 Austria-Hungary : 



Steierdorf, Banat. 



Crojii-. Cialicia. 



Krakaii. 

 Italy. 



Switzerland. 

 Portugal. 

 Sweden. 



Spitzbergen: 



Cape Boheman. 



Advent Bay. 



Cireen Harlmr 

 King Karls Land. 

 Franz Josef Land. 

 Greenland : 



Cape Stewart. 



E;ist Coast. 

 Siljeria: 



.Vmurland. 



Irkutsk. 



Lena Delta. 

 Chosen (Korea). 

 Japan . 

 Caucasia. 

 Turkestan. 

 India: 



Culcli. 



Jalialpnr. 

 China: 



Tyskyp-Tag. 



Honler Ihuni Desert. 

 Austriilia. 

 New Zealand. 

 Graham Land: IIo])e Bay. 



The flora of Graham I^and, which has recently been careftiUy ehiboratc-d by Halle,' is 

 worthy of more than passing notice. This flora comprises 01 forms dispersed among tlie larger 

 groups as follows: Filical(>s 2.5, Cycadales 17, Coniferales Ifi, unknown .3. It is of interest to 

 note that the (linkgoales, which form an important and varie<l element in the nortliern h(>mi- 

 sphere, are entirely absent from the Antarctic locality, as indeed tliey are from the tiontlwanas 

 of India, and that Podozamites, which is abundant and variable in tiie north, is absent from 

 the Hope Bay collection an<l is represented only by dotd)tful fragments in the Indian localities. 

 Of the 22 species from Graham Land that were previously known, !) are common to the Lower 



• nallc, T. G., Mesozolc flora of Qraham Land: Wissensch. Ergebnisse der scliwcdUchcn Sildpolar-Expedilion. 1901-1903, vol. 3. pt. 14. pp. 

 1-123. Pis. I-IX, 1913. 



