164 . Annals of the South African Museum. 



between these. The mouth aperture is of transversely oval form. 

 The surface is so far weathered that no sculpture can be seen except 

 on the base, where traces of numerous raised longitudinal (spiral) 

 ornamenting ridges, crossed by ridges of growth, may be detected. 

 The spiral angle is about 85. 



Dimensions. 



Height 90mm. 



Greatest width of base 100 



Height of aperture 44 , , 



Approximate breadth of aperture 55 ,, 



Occurrence. Collected by Miss Wilman at Coega. 



Remarks. This single specimen is the first representative of its 

 genus yielded by the Uitenhage beds, and it is a matter for regret 

 that the preservation is so indifferent that a more precise description 

 of characters is impossible. We must await the addition of further 

 material before the nature of the sculpture can be ascertained and 

 the nearer relationships made clearer ; in the meantime it would be 

 unjustifiable to propose a specific name. In general figure the shell 

 is not unlike Pleurotomaria (Leptomaria) tithonia Zittel,* but the 

 spiral angle is rather wider than in that form, and if viewed in 

 aperture-aspect it is seen that the whorl is deeper in section in the 

 Uitenhage shell, and the mouth much less transversely elongated. 



The form of the whorls is not unlike that of Pleurotomaria 

 tardensis Stanton,f from the Belgrano beds (Lower Cretaceous) of 

 Patagonia, which is also similar by reason of its large dimen- 

 sions ; but in the Coega specimen the outer margin of the body- 

 whorl is less broadly rounded and the spiral angle is rather 

 smaller. 



GENUS TUEBO Linneeus. 



TURBO ATHEESTONI Sharpe. 



Plate VIII., figs. 6, 6a, 7, 7 a, 7b. 



1856. Turbo atherstoni D. Sharpe, Trans. Geol. Soc. Lond., ser. 2, 



vol. vii., p. 200, pi. xxviii., figs. 15, 16. 

 1856. Turbo baini D. Sharpe, Ibid., p. 200, pi. xxviii., figs. 17, 18. 



Supplementary Descriptive Note. The shell consists of about six 

 whorls, the first four of which have a smooth, flat, or very slightly 

 concave upper surface, sloping down very gently from the spiral 

 suture. The outer side of the whorl is truncated, with a sharp and 



* Zittel (4), p. 337, Taf. 50, figs. 5, 6. 

 f Stanton (3), p. 29, pi. vii., figs. 1, 2. 



