268 Notices of Memoirs — The Lenham Sandstones of Kent. 



probably a more recent horizon which represented the Mio-Pliocene 

 or Older Pliocene, a period slightly anterior to the Diestian. He was 

 also of opinion that the zones of Terebratula grandis and Isocardia cor 

 could not be separated, but belonged alike to the Diestian division of 

 the Pliocenes. 



In a further contribution, Mr. Harnier * regarded the Lenharn Beds 

 as synchronous with the ferruginous sandstones of Louvain and Diest. 

 He stated that among the Diestian sandstone fossils were about sixty 

 species of Mollusca, some being Crag forms, whereas a few were of an 

 older or Miocene type and not found in the Coralline Crag; similarly 

 the Lenham shells included many Miocene species, such as Terebra 

 acuminata, Triton heptagonum, Pleurotoma consobrina, P. j'ouanneti, 

 Cancellaria contorta, Hinnites cortesyi, and Area diluvii. A table of 

 the British Pliocene deposits was included, being nearly similar to 

 that issued by the same author in 1900, in which the " Lenhamian " 

 formed the lowest of the Pliocene stages, the Box-stones being 

 regarded as equivalent to the Waenrode Beds of Belgium (Bolderian, 

 according to Mr. Yan den Broeck). 



Subsequently Mr. Harmer 2 repeated his former views on the age 

 of the Lenham deposits, the fauna being spoken of as presenting 

 a distinctly older type than that of the Coralline Crag and approaching 

 more nearly a Miocene facies, instancing, among other shells, the 

 abundance of Anadara diluvii, which occurs in the Vienna Basin, 

 the Touraine area of France, and the Bolderian of Belgium. 



In their memoir on the geology of Holland, Messrs. G. A. F. Molen- 

 graaff and A. J. M. Van AVaterschoot Van der Gracht 3 referred to 

 the occurrence of Anadara diluvii in the Lenham Beds as indicative of 

 a Miocene age, the same shell being found in the Miocene deposits of 

 Peel and Winterswyk in Holland, the rocks of the former place 

 being stated as the equivalent of the " Glimmertons" of the north of 

 Germany or the Tortonian stage of the Miocene, whilst the beds at 

 Winterswyk were regarded as Middle Miocene. This work also 

 included lists of molluscan species from the Upper and Middle 

 Miocene deposits of Holland, many of which are found in the 

 Lenham Beds. 



Another reference to the geological aspect of this subject has been 

 made by Mr. F. "W. Harmer 4 in an "Introduction " to a new work 

 on British Pliocene Mollusca, where he adheres to his previously 

 expressed views that the Lenham Beds with the " Box-stones" and 

 the Belgian Diestian deposits should be grouped as Lower Pliocene 

 and that the Coralline Crag beds of East Anglia should form the base 

 of the Upper Pliocenes. 



A final notice to make involves a slight alteration in the views of 

 Mr. C. Beid, 5 who, in a work recently published, places the Coralline 



1 "A Sketch of the Later Tertiary History of East Anglia" : Proc. Geol. 

 Assoc., vol. xvii, pp. 416-79, 1902. 



2 "The Pliocene Deposits of the Eastern Counties of England": Geol. 

 Assoc, Jubilee Volume, 1908, pp. 86-102. 



3 " Niederlande " : Handb. Region. Geol., vol. i, pt. iii, pp. 51-3, 1913. 



4 The Pliocene Mollusca of Great Britain (Mon. Pal. Soc), 1914, pt. i, p. 5. 



5 C. & E. M. Eeid, "The Pliocene Floras of the Dutch-Prussian Border" : 

 Mededeel. Rijks. Delfst., 1915, No. 6, p. 9. 



