﻿20 



ME. E. B. NEWTON ON A FOSSILIFEBOUS [vol. lxxii, 



POSTSCEIPT. 



[Since the reading of this paper two memoirs have heen published 

 on some Miocene limestones from the North-Sea basin (Denmark 

 and Germany) containing mollusean remains, several species of 

 which are identical with those found in the North- Sea Limestone. 



In a Middle Miocene boulder from Esbjerg (Denmark), E. M. 

 Norregaard 1 has reported the occurrence, among other shell- 

 remains, of Arcoperna sericea, Tellina benedeni, Naficina alderi, 

 Streptochetus sexcostatus, and Actceon tornatilis ; while Karl 

 Gripp 3 enumerates the same species as occurring in some older 

 Miocene deposits of Denmark and Germany, with the following 

 additional forms : — Isocardia humana (=cor), Thyasira flexuosa^ 

 Dentilucina borealis, Lcevicarclium fragile, Gyprina cf. islandica* 

 Tellina benedeni (=fallax) , JPanopcea menardi, Ficus simplex, 

 and Bingiculella ventricosa, all of which are found in the North- 

 Sea Limestone. Again, attention may be directed to a recently 

 published account of the Lenham Sandstone Mollusca, 3 which have 

 been referred to a late Miocene age, the following species contained 

 therein indicating affinities with the fauna of the North-Sea Lime- 

 stone : — Aporrhais pespelicani, Streptochetus sexcostatus, Actceon 

 tornatilis, Scaphander lignarius, Yoldia oblongoides, Isocardia 

 humana, Dentilucina borealis, Tellina benedeni, and Panopcsa 

 menar di. E. B. N. March 27th, 1917.] 



EXPLANATION OF PLATE II. 

 [All the figures are of the natural size, except where otherwise stated.] 



Fig. 1. Ranella gigantea Lamarck. (See p. 11.) Prepared from a wax 

 model taken from a limestone cavity. 



2. Streptochetus sexcostatus (Beyrich). (See p. 14.) 



3. The same, showing magnified sculpture. 



4. Ficus simplex (Beyrich). (See p. 14.) 



5. The same, showing details of sculpture, magnified. 



6. Xenophora sp. (See p. 14.) Fragmentary specimen exhibiting 



adherent cavities on the whorl. 



7. Naticina alderi (E. Forbes). (See p. 15.) 



8. The same. 



9. Ringiculella ventricosa (J. de C. Sowerby). (See p. 15.) Front. 



view, X 3. 



10. The same, showing sculpture lines, magnified. 



11. Nucula Isevigata J. Sowerby. (See p. 16.) 



12. Yoldia oblongoides (S. V. Wood). (See p. 16.) 



13. Isocardia liumana (Linnasus). (See p. 18.) 



1 ' Mellem-Miocasne Blokke fra Esbjerg' Danmarks Geol. Undersog. ser. 4,. 

 vol. i, No. 5 (1916) pis. i-iii, pp. 58. 



2 ' Ueber das Marine Altmiocan im Nordseebecken ' Neues Jahrb. Beilage- 

 Band xli (1916) p. 59, pis. i & ii (maps). 



3 B. B. Newton, ' On the Conchological Features of the Lenham Sandstones 

 of Kent & their Stratigraphical Importance ' Journal of Conchology, vol. xv 

 (1916) pp. Ill, 112. 



