128 Annals of the South African Museum. 



and the complete agreement in the sculpture, leave no doubt 

 that the specimen from Coega Valley must be identified with 

 C. nuculoides. 



The form of the shell is that of a four-sided figure with 

 rounded angles. The anterior margin is short, the posterior margin, 

 on the other hand, very extensive. The umbonal region is relatively 

 weakly developed. The surface is beautifully ornamented by 

 numerous, minute, radial striae which cannot be seen with the 

 naked eye. The intercrossing of the striae with concentric growth- 

 lines results in a delicate cancellation. 



GENUS ASTAETE J. Sowerby. 



ASTABTE LONGLANDSIANA Tate. 



1867. Astarte long land siana R. Tate, Quart. Journ. Geol. Soc., 

 vol. xxiii., p. 158, pi. viii., figs. 5a, 5&. 



Occurrence. Specimens in the collection of the Geological Society 

 are from the Zwartkop's River. M.r. Rogers obtained an immature 

 example of this form in the Coega Valley east of the railway, 

 one mile up the line from Coega station (477g). 



Remarks. The immature specimen from the Coega Valley 

 measures only 19 mm. in height. It has both valves in position, 

 and the umbonal region of the right valve is perfectly preserved. 

 The umbo is acutely pointed and is ornamented by closely spaced 

 concentric ribs up to the apex. Tate says that the valves are 

 ornamented with " slightly elevated ridges of growth," but it would 

 be more correct to say that the ornamentation consists of well-raised 

 concentric ribs. The ribs show some little irregularity of spacing. 

 The surface between the rib-summits frequently shows finer 

 concentric lines, which appear here and there to have the regularity 

 of definite sculpture, though in places they resemble ordinary ridges 

 of growth. The escutcheon is narrow, steep-sided, and deeply 

 excavated, and the ribs of the flank terminate abruptly at the acute 

 margin which bounds the escutcheon. 



SUB-GENUS ERIPHYLA F. Stoliczka ( ? W. M. Gabb). 

 ASTABTE (EBIPHYLA) HEBZOGI (Goldfuss). 



1840. Cytherea licrzogii (Hausmann) A. Goldfuss, Petrefacta 

 Germanise, Band ii., Lief. 7, p. 239, Tab. cxlix., fig. 10. 



