I'r.ATE 23 



I'llgO 



FXGLUKS 1.2. OrUiis idlJi/Kinnmi ortlnnnlioiiitcs von liucli 43 



1. Extorior of a partly exloliatcd peilicle valve. 

 Lowt'i- Ordoviciaii, "Wutiiiij foriuaticm : Sandy liuie.stuue 



near I'en-lisl-hu, Liao-tunji. Manelmria. 



2, Exterior of a partly exfoliated pedicle valve. 

 Lower Ordovician, Wuting formation : Sandy limestone 



on top of Wu-ting-shan, Liao-tung, ^laneliuria. 



3-7. DdliiniiK 11(1 {'!) .species undetermined 44 



3-5, Three partly exfoliated pedicle valves. 

 6, 7, Two partly exfoliated l)racLiial valves. 

 Formation and locality same as Figure 1. 



8. Rafiuextiuiiia species undetermined 45 



A poorly preserved pedicle valve. 



Lower Ordovician. Wuting formation : In black limestone 

 near Wu-hu-tsui, Liao-tung. Manchuria. 



9. Rafinesquina .species undetermined 45 



A partly exfoliated pedicle valve. 



Lower Ordovician. Wuting formation: In gray limestone 

 near Hsiao-shih, Liao-tung, Manchuria. 



10. Phrfif/iiiolitcs species undetermined, X 4 50 



rmhilical view of the specimen described. 

 Lower Ordovician. Wuting formation : In black lime- 

 stone, 2 miles west of Chiao-tou, Liao-tung, Manchuria. 



11, 12. Oxydiscus planulatus, new species 51 



Top and side views of the type specimen. 

 Formation and locality same as Figure 10. 



13. Eccyliopterus species undetermined 60 



Top view of the fragmental siiecimen. 

 Formation and locality same as Figure 1. 

 14-18. Raphisilotna cf. (tcquiUttvnim Koken ? 51 



14, Top view of a partly weathered specimen. 

 Formation and locality same as Figure 2. 



15, Top view of a partly weathered specimen. 



Lower Ordovician. Wuting formation : In l)lack lime- 

 stone near Ilsia-kan-ygao, south of Ycn-lai. Liao-tung, 

 Manchuria. 

 lf>-18. Top, umbilical, and side views of a cast. 

 Foi"mation and locality same as Figure 1. 



19, 20. Ilclirotoma species undetermined 60 



Top and side views of the described spec-imen. 

 P^trmation and locality same as Figure 1. 

 130 



