97 



JOURNAL OF CONCHOLOGY. 



Vol. 15. 



OCTOBER, 1916. 



No. 4. 



ON THE CONCHOLOGICAL FEATURES OF THE LENHAM 



SANDSTONES OF KENT 



AND THEIR STRATIGRAPHICAL IMPORTANCE. 



( Continue! from page 84). 



By R. BULLEN NEWTON, F.G.S.,i 

 OF THE British Museum. 



(Presidential Address delivered at the Annual Meeting, October i6th, 1915). 



Fam. PTERIID^ (=Aviculid^). 



Margaritifera phal^nacea Lamarck. [Plate 2, fig. 9]. 



Aviada phalcznacea Lamarck : Hist. Nat. Anim. sans Vert., 18 19, 



vol. 6, part i, p. 150. 

 Avicula phalcenoides S. V. Wood : Mon. Pal. Soc, 1874, Suppl., 

 pi. 8, fig. 12, and Addend. Plate, fig. 23, pp. 109, 188. 



Note. — The genus Margaritifera of Patrick Browne was founded 

 on the Linnsean type, Mytilus tnargaritiferus (The Civil and Natural 

 History of Jamaica, 1789, p. 412) ; Lamarck's Me/eagrina is a 

 synonym. 

 Distribution — 



Coralline Crag 

 Plaisancian 

 Lenham Beds... 

 Anversian 

 Vindobonian ... 

 Burdigalian 

 Aquitanian 

 Colleciio7i — 



M.P.G., No. 409. 

 Fam. OSTREID^. 



OsTREA PRiNCEPS S. V. Wood. [Plate 2, fig. 16]. 



Ostrea undulata Nyst : Recherch. Coq. Foss. Anvers, 1835, P- 20 



{tion J. Sowerby). 

 Ostrea priuceps S. V. Wood : Mon. Pal. Soc, pi. i, fig. i, and 

 pi. 2, fig. 2, p. 17. 



Britain 



...France (S.) 



Britain 



Belgium 



Vienna Basin ; Italy 



France 



Italy. 



I Published by permission of the Trustees of the British Museum. 



