62 



N. Kanehara 



The Torinosu limestone is found at Sakawa, Itsukaichi, the Soma 

 district, and other localities. The limestone of Sakavva contains Cy- 

 clammina, Textularia, Chaetetopsis, Convexastrea, Cidaris, Terehrahda, 

 Rhynclionella, Harpoceras, Metasolenopora, Myriopora, Nerinea, etc. 



The Ryoseki Series has a wide distribution over the provinces of 

 Tosa, Awa (in Shikoku), Kozuke, Rikuchti and Eikuzen. It is rich in 

 plant fossils, such as OnycMopsis, Sphenopteris, Cladoplihhis, Podo- 

 zamites, DicJcsom'opteris, Zamiophyllum, Nilssonia, etc. 



The Miyako Series in Eikuchil yielded Trigonia and OrlitoUna. 



The Trigonia sandstone is characterized by various forms of 

 Trigonia, besides some Ammonites. 



The Izumi sandstone, extending from Kii Peninsula to Kyushti 

 through Shikoku, contains Turrilites, Gacullaea, Inoceramus, FacJiy- 

 discus, Pecten, Natica, Anisoceras, Hamites, etc. 



The Toyajo Series contains Acanthoceras in its lower part and 

 Gaudryceras, Tetragonifes, Turrilites, Pachydiscus, Inoceraon^ts, etc. 

 in the upper. 



The Ammonites Beds of Araakusa yielded Mortonioceras, Pero- 

 niceras, Gaudryceras, Pachydiscus, Hamites, etc. 



The Futaba Series is found in the Soma district of Iwaki and 

 contains Puzosia, Baculitcs, Gaudryceras, Bostrycoceras, Trigonia, teeth 

 of Ichthyosaurus and Plesiosaurus, etc. 



The Cretaceous of Hakkaido is rich in Ammonites. Although the 

 lower beds contain only Lyfoceras, Acardhoceras and a few other, the 

 upper beds ai-e profust-ly furnished with various forms of Mammites, 



