FORMATIONS AND FOSSILS OP SOUTH MANCHURIA 



33 



Examination of the foregoing list indicates that the Peilintze 

 formation has more forms in common with the Santao than has the 

 Lingchiashan. I might add that considerable doubt exists as to 

 the correlation of the Canadian strata in North China. For ex- 

 ample, how can such a late Canadian form as Piloceras be found at 

 two horizons so widely separated vertically as 416 m (from horizon 

 F3 of the Lingchiashan formation to Fi of the Peilintze formation) ? 



The major characteristics of the Ordovician strata in Korea have 

 been described by T. Kobayashi (192Y) ; according to him, the 

 faunal characters of the Bantatsu formation, which occurs 5 kilo- 

 meters east of Heijo, and the Chikunsan fossil beds, about 180 kilo- 

 meters east-southeast of Keijo (Seul), show remarkable differences, 

 the former having intimate connection with the Ordovician strata 

 in Manchuria. The same author later (1930) expresses his views 

 as follows: 



The fauna of group II [Unkaku bed] consists of a total of 30 species and 1 

 variety, of which 15 species and 1 variety are quite new to science, all the 

 remainder being found in either the Machiakou or the Toufangkou fauna, or 

 in both, so that the present fauna can readily be compared to that of Toufangkou 

 and Machiakou. 



Specific names 



Toufangkou 

 fauna 



Machiakou 

 fauna 



Lophospira morrisi 



Lophospira gerardi 



Lophospira trochiformis 



Pagodispira tetracarina 



Liospira barbouri 



Eccyliopterus kushanensis 



Maclurea tofangoense 



Cycloceras mantalense 



Stereoplasmoceras pseudoseptum 



Stereoplasmoceras submarginale 



Actinoceras richthofeni 



Actinoceras submarginale 



Actinoceras manchurense 



Actinoceras nanum 



Ormoceras [Actinoceras] suampanoides- 



Ormoceras [Actinoceras] tani 



Ormoceras [Actinoceras] harioi 



X 



X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 



X 

 X 

 X 



X 

 X 



X 

 X 



Among the cephalopods in the fauna of Group II [Unkaku bed], the actinoc- 

 eroids predominate as is usually the ease with the Black River and Trenton 

 series in the Arcto-American province. * * * 



Among the gastropods, there are many species which more or less resemble 

 those of the Stone River, Black River, and the Trenton fauna of North 

 America, while a few species bear some resemblance to the Cincinnatian and 

 Canadian species. * * * 



Fossils from Group III [Bantatsuan bed]. — Among the fragmentary fossils 

 obtained from Group III is one specimen which belongs undoubtedly to 

 Stereoplasmoceras sp. All the others are imperfect specimens of brachiopods. 



