10 Art. 8. — A. Ivryshtofovich : 



stones with a few but rather thick intercalations of dark shales, 

 with a fauna composed of Inoceramus Schmidtil Michael, Gaudry- 

 ceras striatum Jbibö, Puzosia cf. japonica Jimbô, Pachydiscus cf. 

 Jimböi Yabe, etc. Some of the localities are on, both slopes of the 

 Coastal Ranges, but the principal one is at Cape de la Jonquière. 

 According to modern views, the fauna is contemporaneous with 

 that of the Pachydisciis-hed of Hokkaido. But the animal fossils 

 are limited to a very small part of the entire thickness of the 

 series. The other parts above and below are characterized by the 

 presence of leaves of Popidus, Credneria, Viburnum, etc., which 

 bring the sediments into the age of the Patoot-Bed of Greenland, 

 which to a greater part belongs to the Senonian, but partly also 

 probably to the Turonian. The presence of the Orokkian Series 

 outside of the Coastal Range, which it composes, was observed in 

 the continental facies on the opposite side of the Alexandrofka 

 graben, that is on the slopes of the Western Range a httle 

 above Petrovsky's coal mine. Considering the beds of Cape de 

 la Jonquière as equivalent to the Pachydiscus-hed of Hokkaido, 

 i.e. typically Senonian, we must regard the thick conglomerates 

 occupying the lowermost part of the conformably overlying " Ter- 

 tiary " as probably the Danian or Laramie. The Orokkian Series 

 was for the greater part deposited continentally ; and only in the 

 upper part, that is surely later than the beginning of the Senonian, 

 the transgression of deep sea took place during a short time at 

 places to the south of Alexandrofsk. Coals are found in the upper- 

 most and probably also in the lower part of the Orokkian. 



II. The Gyliakian Series. 



This series is composed of shallow water sandstones, with 

 thick conglomerates in some places, besides dark-grey shales with 

 coals and coaly shales. This division is characterized only by an 



