Plate 31 



Page 



Figure 1. Polytoechia ? taijucii.sis, new species 49 



Exterior of a pedicle valve. 



Uppermost Canadian, Santao formation : In the gray lime 

 stone north of Pen-hsi-hu, Liao-tung, Manchuria. 

 2-A. Cameroceras cf. styliforme Grabau 62 



2, A cross section of the siphunele. 



3, A cross section of another siphunele. 



4, Dorsal view of siphunele of the same specimen, showing 

 a part of endosiphuncle. 



Formation and locality same as Figure 1. 

 5, G. Culathium frechi, new species 38 



5, Weathered surface of the top of the holulyi)e. 



6, A polished cross section of the same specimen showing 

 the canal system and cup. 



7, 8. Anthaspidella ? planulata, new species 37 



A polished cross section and the weathered surface of the 



holotype. 

 Formation and locality same as Figure 1. 



138 



