Scientia Sinica

No. 1 WANG: NEW SPECIES OF BRACHIOPODS [I] ' 159

W estonia sheng: Wang (sp. nov.) @AL i, IDs Tiss, il)

Represented by two ventral valves.

General form elongately oval, with the width about two-thirds the length; lateral profile moderately convex; anterior margin subtruncated, narrower than the greatest width in the middle of the valve; postetior extremity obtusely acuminate; concentric growth lamellae well developed, whole surface ornamented by fine, ripply lines.

Dimensions (mm): Length 8.7; width 6.4.

Figured specimen, I.P.A.S. 7985.

Horizon and locality: Fengshan Formation, Upper Cambrian; west of Hsiatsun Village, Chiawang Coal Field, Kiangsu Province.

Collector: J. C. Sheng.

Discussion: Westonia shengi strongly recalls W. blackwelderi Walcott”! found in the Middle Cambrian, Shantung Province, but differs from it in the possession of more convex postero-lateral margins and a subtruncated anterior end.

Genus Lingulepis Hall 1863 Lingulepis nanchuanensis Wang (sp. nov.) (PIS Es Big) General form elongately oval; posterior margin bluntly acuminate, anterior margin broadly rounded; proportion between length and width about 3:2,

with the widest part near the anterior margin. Surface ornamented by concentric growth lines and fine radiating striae.

Dimensions (mm): Length 12.3; width 7.7. Figured specimen, I.P.A.S. 7986.

Horizon and locality: Panho Series, Lower Ordovician; Hot Spring, east of Nanchuan City, Szechwan Province.

Collector: The author.

Discussion: This species is represented by a single flattened specimen. In general outline, this species agrees with Lingulepis cf. acuminata (Conrad)®! found in Patzelao, Tu District, Hupeh Province, but differs from it in the possession of more convex lateral margins and less acuminate posterior extremity.

Genus Lingula Bruguiere 1792 Lingula kwani Wang (sp. nov.)