29 



In nearly all of the Ordovician districts in southern China the strata 

 seem to be developed in intimate relation with Gotlandian rocks. This and 

 the very extensive development of Devonian rocks are two geological features 

 characteristic of southern China. 



One of the Chinese fossils familiar to geologists from early times is 

 Orthoccras c /line use Foord, the polished slab of reddish mottled earthy limestone 

 with this fossil being a favourite ornament for alcoves in Chinese houses 

 (Pagoda stone). This was formerly regarded as a Devonian fossil ; but lately 

 Frech has assigned it with right to Ordovician.'* The locaHties of the slabs 

 with O. rhinciisf, first described, are recorded as being (i) near I-chang-' in 

 Prov. Hu-pei''* and (2) north of Kwan-tung.^' The apparently inexhaustible 

 supply of this material for ornamental purpose indicates that these places are 

 to be counted among localities prolific in Ordovician fossils. 



Through the contributions of K.vysek," P'rech,"' Martelli/> Mansuy,^* 

 Wellek,''''' Brown''* etc., the development of Ordovician rocks in the following 

 districts are confirmed on the evidence of fossils. 



I. Lun-shan,"' WSW of Tsh6nn-kiang,"> prov. Kiang-su Upper 

 Ordovician ; ident. by Frech. 



Asii/^hiis sp. of the group of A. cxpiniisus. 



Eiidoccras duplex Wahlenberg 



Orthisina squamnta v. Pamlen. 



1) Frech: Richthofen's China, vol. V., p. 10. 



2) I-chang = gg 



3) Hu-pei = y^)J;J[: 



4) Kwan-tung = ^:^ 



5) Kayser: Mittel-und Obersilurische Versteinerungen aus dem Gebirgsland von Tshau-tien. 

 Richthofen's China, vol. IV. 



6) Frech: I.e. 



7) Martelli: F"ossili del Siluriano inferiore dello Schensi. igoi. 



8) Mansuy: Etude geologique du Yur.-nan oriental. Paleontologie. igo2. 



g) Brown: Contributions to the Geology of the Province of Yun-nan in western China. III. 

 Notes on the Stratigraphy of the Ordovician and Silurian Beds of western Yun-nan. Re- 

 cords Geol. Surv. India. Vol. XLIII. 1913. 



10) Lun-shan = ^|i| 



11) Tsh6nn-kiang = K;fi; 



12) Kiang-su = fxis 



13) Frech: Ueber Palaeozoische Faunen aus Asien und Nordafrika. N. Jahrb. M. G. P. 

 1895. Bd. II. Fkech in Richthofen's China, vol. V., pp. 2. 3. 



14) S. Weller: I.e. 



