24 Art. 8.— A. Kryshtofovich : 



plants fossils, now in the collection of the Sapporo College of 

 Agriculture, were long ago determined by Lesqueeeux and mentioned 

 afterwards by Nathoest^^ and Jimbö.^^ 



We find some other indications of Japanese fossil floras, 

 supposed to be Cretaceous, mentioned in Haeada's " Japanische 

 Inseln " and in " Outlines of the Geology of Japan " published by 

 the Imperial Geological Survey of Japan. These are the Dicotyle- 

 don leaves found in the Mikura Bed in Abegöri in the Province of 

 Suruga and also in the province of Kii (Haeada, p. 109) ; and the 

 fucoids (shöbu-ishl) and Sequoia sp. in the Izumi sandstone of the 

 Sanuki-Range, Island of Shikoku (I.e. p. 107). In the same 

 sandstone, in the Island of Kyü-shü, were observed (Haeada, p. 

 108) Dicotyledon leaves at Kidobaba and impressions of Ariindo, 

 Populus, Salix, (?) Quercus (?) Fagus, Platanus and Cinnamomum 

 at Komatsu-mura (Outlines, p. 66). If they are really Cretaceous, 

 they belong probably to its uppermost part. 



IV. The Cretaceous in Russian Sakhalin as 

 coaI=bearing strata. 



As has been mentioned above, the Cretaceous system of 

 Sakhalin is coal- bearing nearly throughout its whole extent, except 

 the horizon of marine transgression. The coal seams occur in the 

 lower and probably also ia the uppermost division of the Orokkian, 

 as well as in the whole Gyliakian. The Ainuan is also coal- 

 bearing, but nothing can at present be said about the distribution 

 of its coal. 



Though sometimes of a great thickness and being coking, the 

 Cretaceous coals are distinguished by almost constant abundance 

 of ashes, and numerous intercalations of coaly shales, Besides, the 

 coal is traversed by numerous clefts filled with calcite, thus in- 



1) ÎNAIHOEST (1883), p. 5. 2) JiMBô (18y2), p. 46, 47. 



