284 PROCEEDINGS OF THE MALA.COLOGICAL SOCIETY. 



Camptonectes of. CUETATUS (Geinitz). PI. XXIV, Fig. 15. 

 Peden curvatus, Geinitz: Versteinerungen von Kieslingswalda, 1843, 

 p. 16, pi. lii, fig. 13. 



Formation. — Cretaceous. 



Locality. — Zululand, South-East Africa. 



This shell exhibits two divergent bands emanating from the umbo, 

 ■which may have originally extended to the ventral margin. The 

 reddish-brown colour which the bands now present ceases about two- 

 thirds distance from the umbo, although there are slight indications 

 that the bands were continued to the base of the valve. From the 

 character of the radiating ribs which curve outwards on each side the 

 specimen appears to be closely related to Pecten arcuatus of Goldfuss, 

 the supposed equivalent of the curvatus of Geinitz. This shell was 

 collected by Mr. Anderson in Zululand, and is at present under 

 description in another place. It will ultimately become the property 

 of the British Museum. 



Cypkina lineolata (J. Sowerby). PL XXIV, Fig. 14. 

 Venus lineolata, J. Sowerby : Min. Conch., vol. i (1813), p. 57, pi. xx, 

 upper figure. 



Formation. — Albian. 



Locality. — Blackdo wn , Devonshire . 



The original description states that "four-fifths of the surface [is] 

 covered with obscure zigzag striae." The figure now given of this 

 shell has been drawn from Sowerby' s original specimen in the British 

 Museum [43104]. Parkinson first referred it to Venus castrensis of 

 Linnseus, but Sowerby pointed out that it differed from the Linnaean 

 shell, and therefore changed the specific name as above. Parkinson's 

 description mentioned that it "is perfectly silicified, and in the 

 transparent parts the angulated tent-like cliaracters are beautifully 

 shown in white and opaque markings" ("Organic Remains of 

 a Former World," vol. iii, 1811, p. 187). Another specimen in 

 the British Museum [L. 17209] shows the chevron pattern as a series 

 of well-indented lines. 



Although up to the present time the zigzag striae of this shell have 

 heen referred to as part of the sculpture, it seems more than probable 

 that they are attributable to a former coloration. The V-shaped 

 patterns, although obscure in places, are seen to cover the valve, with 

 the exception of the posterior side ; they are of darker colour than the 

 ordinary ground tint, having all the appearance of being still filled 

 with a material wliich might represent the pigment originally secreted 

 by the mollusc, but under considerably altered mineralogical conditions. 



MESOZOIC— Oolite. 



GASTROPODA. 

 Natica cincta, Phillips. PI. XXIV, Fig. 12. 

 Natica cincta, Phillips : Illustrations of the Geology of Yorkshire, 

 Yorkshire Coast, 1829, p. 130, pi. iv, fig. 9. 

 Formation. — Bathonian. 



