574 MR K. BULLKN NEWTON ON SOME CRETACEOUS BHACHIOPODA 



Fam. Saxicavid^e. 

 Paiwpsea cf. plicata, J. de C. Sowerby. 



Mya plicata, J. de C. Sowerby : Mineral Concholoyy, 1823, vol. v, pi. 419, fig. 3. 



Panopna plicata, J. de C. Sowerby, Mineral Concholoyy, 1829, vol. vi, p. 211; Pervinquiere, Etudes Pal. 



Tunisienne : Gast. Lamell. Cretaces, 1912. pi. xxi, figs. 1-4, p. 284 (see this work for comprehensive 



synonymy). 



Remarks. — A large limestone cast, with united valves, exhibits the contour lines 

 of this species. Its length is roughly about twice the height given in the original 

 description. 



Dimensions, — 



Length . . . . . .107 mm. 



Height . . . . . . 60 „ 



Diameter . . . . . . 47 ,, 



Distribution. — Generally regarded as a Lower Cretaceous species, being found 

 in Britain, Europe, and Tunisia. Pervinquiere mentions a probable Cenomanian 

 example from Tunisia. 



Locality. — No. 11 — from 50 metres above Catumbella Dam. 



Fam. PHOLADOMYIDiE. 



Pholadomya cf. vignesi, Lartet. 



Pholadomya viynesi, Lartet, Explor. Geol. Mer Morte, 1877, pi. xi, fig. 9, p. 126; Blanckenhorn, Beitr. 

 Geol. Syriens, 1890, pi. v, figs. 14-17, p. 94; Pervinquiere, Etudes Pal. Tunisienne: Gast. Lamell. 

 Cretaces, 1912, pi. xxi, figs. 8, 9, p. 290. 



Remarks. — It is interesting to be able to record a small form of Pholadomya 

 which is evidently related to P. vignesi. The specimens consist of two limestone 

 casts representing the subglobose valves of this species, and which are furnished 

 with numerous radial costse — excepting posteriorly, where the surface is smooth — 

 and obscure concentric striations. This sculpture, best seen in the umbonal 

 region, includes also a minutely granulated structure. As remarked in a previous 

 account of the species from Zululand by the present writer, # it is unquestion- 

 ably related to Cardium lucerna of Forbes from the Upper Cretaceous rocks of 

 Southern India, t and would appear to differ chiefly in possessing finer and more 

 numerous costse. 



Dimensions. — 



Length ...... 22 mm. 



Height . . . . . 21 „ 



Diameter (with closed valves) . . . 17 ,, 



* Trans. Roy. Soc. South Africa, 1909, vol. i, p. 80. 



t Trans, (hoi. Soc. London, 1846, ser. 2, vol. vii, pi. xvii, fig. 10, p. 145. 



