Scientia Sinica

176 SCIENTIA SINICA Vol. V

Dimensions (mm): Length 6.8; width 6.8; thicksiess 3.6. Holotype, I.P.A.S. 8019.

Horizon and locality: Lojoping Series, Middle Silurian; east of Tashutze, Yingwuhsi, Ssunan District, Kweichow Province.

Collector: The author.

Discussion: The assignment of the present shell to Zygospira is based only on its external similarity of the genus. It is characterized by the subcircular outline, non-appearance of a fold and sulcus in the median part of the valve.

(To be contunued)

REFERENCES

[1] Walcott, Charles, D., 1912. Cambrian Brachiopoda. Monog. United States Geol. Surv., 51, 426—427, pl. 32, figs. 5, 5a-g.

[2] , 1913. The Cambrian Faunas of China. Research in China, 3, 68—69, pl. 2, figs. 5, 5a-c.

[3] Hsu, Singwu, C., 1948. The I-Chang Formation and the Ichangian Fauna. Contr. Inst, Geol., Acad. Sinica, 8, 43—44, pl. 9, figs. 16-18.

[4] Sinclair, Winston, G., 1945. Some Ordovician Lingulid Brachiopods. Trans. Roy. Soc. Canada, Ser, 3, sect. 4, 39, 63, pl. 2, figs. 3-6.

[5] Walcott, Charles, D., 1913. Idid., 62—63, pl. 1, figs. 7, 7a.

[6] Ulrich, E. O. and Cooper, G. A., 1938. Ozarkian and Canadian Brachiopoda. Geol, Soc. Amer. Spec. Papers, 13, 83—84, pl. 11D, figs. 9-15.

[7] , 1938. Ibid., 85—86, pl. 9C, figs. 5-7.

[8] Reed, F. R. C, 1917. The Ordovician and Silurian Brachiopoda of the Girvan District. Journ. Roy. Soc. Edinburgh, 51 (4), 840—841, pl. 7, figs. 13-20.

[9] Martelli, Alessandro, 1901. Fossili del Siluriano inferiore dello Schensi. Bull. Soc. Geol, Italiana, 20, 305—307, pl. 4, figs. 7-12.

[10] Walcott, Charles, D., 1913. Ibid., 85—86, pl.5, figs. 1, la-b.

[11] Barrande, Joachim, 1879. Systeme silurien du centre de la Bohéme, 5, pl. 24, II, figs. 1c-9b; pl. 119, figs. 10a.

[12] Kozlowski, Roman, 1929. Les Brachiopodes Gothlandiens de la Podolie Polonaise. Palaeont. Polonica, 1, 158—159, pl.5, figs. 12-14.

[13] Grabau, Amadeus, W., 1931. Devonian Brachiopoda of China. Paleont. Sinica, Ser. B, 3 (3), 121—122, pl. 23, figs. 7ae, 8a-e.

[14] Giirich, G., 1908. Lertfossilien (Devon), 145, pl. 45, figs. 5a-c.

[15] Stainbrook, Merrill, A., 1945. Brachiopoda of the Independence Shale of Iowa. Geol. Soc. Amer, Mem., 14, 42—43, pl. 4, figs. 10-14.

[16] Dunbar, Carl, O. and Condra, G. E., 1932. Brachiopoda of the Pennsylvanian System in Nebraska. Bull. Neb. Geol. Surv., 5, 294—295, pl. 37, figs. 22a-c.