114 JOURNAL OF CONCHOI.OGY, VOL. I5, NO. 4, OCTOBER, I916. 



Reid. The Lenham fauna presents an interesting resemblance to that 

 of the Upper Miocene of North Germany (Reinbeck and Holstein), 

 described by Zimmermann^ and Gottsche,^ and regarded as Messinian 

 or the latest stage of the Miocene period, a formation-term introduced 

 by Mayer-Eymar,^ to include Pontian-Sarmatian, Zanclean, and Mio- 

 cene of other authors. The North German Miocene deposits con- 

 tain twenty-five species of raoUusca wliich are also found in the 

 Lenham beds, among them being Streptochetus sexcostatus, Zaria 

 subangulata, Tellina benedeni, Papillicarduan papillosum, etc. 



Speaking further of this Miocene facies of the fauna, it may be 

 observed that Drillia obeliscus and Clavatula jouaiuieti are first known 

 in Burdigalian times, whereas Margaritifera phalcenacea commenced 

 its career in the Aquitanian stage, which forms the basal or oldest 

 division of the Miocene formation. The following Gastropods may 

 also be referred to as dating from the Vindobonian stage of the 

 Miocene : Streptochetus sexcostatus, also Messinian and Anversian ; 

 Bonellitia serrata, ranging into the Italian Plaisancian ; Terebra acu- 

 minata, occurring also in the Messinian of North Germany, the 

 Anversian of Belgium, and in the Plaisancian and Astian beds of 

 Italy; Maculopeplum lambeiti, recorded as well from the Redonian 

 of France, the Diestian and Scaldisian of Belgium, the Box-Stones 

 and the Coralline and Red Crags of England ; and Ficus reticulata 

 known also from the Redonian of France, the Messinian of North 

 Germany, the Bolderian, Anversian, and Diestian of Belgium, Box- 

 Stones, Lenham Beds, and Coralline Crag of Britain, Plaisancian and 

 Astian of France and Italy, and belonging also to recent seas. Among 

 the chief Pelecypods similarly originating in Vindobonian times are : 

 Glans senilis, known also in the Redonian, Scaldisian, and Coralline 

 Crag ; Arcopagia ventricosa, also Plaisancian and Astian ; Tellifia 

 benedeni, Messinian and from Bolderian to Scaldisian ; Plagiocardium 

 hirsutuin, Plaisancian and Astian ; Astarte basteroti, Redonian, Dies- 

 tian, and Scaldisian; Papillicardium papillosum, Messinian, Redonian, 

 St. Erth Beds, Plaisancian and Astian to recent seas ; Cyprina rustica, 

 Messinian, Anversian to Scaldisian, Box-Stones, and Coralline Crag ; 

 Cyrtodaria angusta, Messinian, Bolderian to Scaldisian, Box-Stones, 

 and Coralline Crag ; and Panopcea mefiardi, Anversian, Messinian, 

 Box-Stones, Coralline and Red Crags. 



The only representative of the Brachiopod group of shells is Tere- 

 bratula perforata, which ranges through the Redonian of France, 



1 Ueber der Schichten der Tertiaiformation welche bei Reinbeck duich die Hamburg, 

 etc. : Amtl. Bei: Deutsch. Nat. Aerz. A'/>/(i846), 1847, pp. 232-234. 



2 Die Molliisken- Fauna des Holsteiner Gesteins : Abhandl. Geb. Nat. \'t:r. Hatitburg, 

 1S87, vol. X., no. 8, pp. 14. 



3 Cat. Syst. Foss. Tert. Mus. Zurich, 1867, part 2, p. 13. 



