Pake azoic Records , Zll 



Bokkeveld beds : — 



Palaeotieilo ant i qua, Sharp e. 



P. rudis, Sharpe. 



P. siib-antiqua, Reed. 



P. a^'. conntricta, Coui-ad (Keed). 



P. cf. fccunda. Hall (Keed). 



P. sp. (Reed). 



P. boi/csi, n. sp, 



P. arcitata, u. sp. 



Palaeon<'ilo\boy('Hi , nov^. sp. 

 PI. VIII., Fig. 4. 



Three specimens ot" a form allied to P. radis, Sharpe, but with 

 a more prominent umbo and longer anterior portion are included 

 in this species. 



Shell elongate elliptical, produced anteriorly, not quite twice 

 as long as liigh. Basal margin almost straight ; anterior end 

 rounded and somewhat narrowed ; posterior end as in P. j'udts, 

 Sharpe, broader, but with weak sinus in the inferior margin. Cardi- 

 nal line about three-fourths the length of the shell. Valves some- 

 what strongly convex, flattened in the middle portion with a ridge 

 running from umbo to posterior margin and then a weak sulcus 

 from the umbo to the marginal sinus. Surface ornamentation 

 consists of tine concentric striae, very shar}) and distinct in the 

 region posterior to the oblitfue I'idge ; also several strong concen- 

 tric furrows. Umbo prominent, situated a little anteriorly to the 

 middle line. The shell has somewhat the shape of the form which 

 Reed likened to P. fecunda, Hall,i but the umbo is more centrally 

 placed, the anterior margin is more produced, and the shell gener- 

 ally is more convex. 



Dimensions : — Length, 5.25 cm. ; height, 3.2 cm. 



Cat. Nos. (SG, 87, Type. Donor : Mr. A. G. Haiu. Localitj' : 

 Hottentot's Kloof. Matrix, dark grey shale. 



Cat. No. 257U. Donor : Geological Commission. Localitj^ : 

 Uitkomst. Matrix, dark gre,y shale. 



'Ann. 8. A. Museum, Vol IV., p. 264, PI. XXXH., fig. 6. 



