Scientia Sinica

NEW SPECIES OF BRACHIOPODS [I]*

Wane YU (= &)

(Institute of Palzontology, Academia Sinica).

In preparing the brachiopod chapter for the “Index Fossils of China”, the writer encountered a difficulty in selecting sufficient materials from the published literature for such a comprehensive compilation. Inasmuch as the “Index” will be in constant use by field geologists, its contents should include extensive illustrations to meet the requirements. With this conception in mind, the writer has made a thorough examination of the specimens kept in the museum of his institute, and has accepted many of them in the “Index”. It is evident that a number of new specific names should be proposed for several materials hitherto not adequately studied. The purpose of this paper is to describe these new species.

A paper dealing with eleven new genera of Brachiopods also contained

in the “Index Fossils of China” was published in Scientia Sinica Vol. IV, No. 2. -

Genus Paleobolus Matthew 1899 Paleobolus discus Wang (sp. nov.) (PI. 1, A; Fig. 1) Represented by a single dorsal valve.

Outline subcircular to roundly oval, greatest width a little anterior to the middle of the valve, gradually acuminate toward the posterior end; anterior margin broadly rounded. Surface of shell marked by sharp, fine, elevated -concentric ridges. These ridges run wavily in the median part and merge each other in the postero-lateral regions of the shell.

Dimensions (mm): Length 5.3; width 5.6. Figured specimen, I.P.A.S. 7981.

Horizon and Locality: Chiushukou Bed, Uppermost Cambrian; limestone quarry, south of Huolianchai Station, Penhsi District, Liaoning Province. Collectors: Members of the Taitzeho Party, 1950.

*First published in Chinese in Acta Paleontologica Sinica, Vol. 1V, No. 1, pp. 1—24, 1956.

157