84 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



Feet. 



Brought forward 40 



e. Dark grey laminated clays, sometimes fossiliferous, with thin layers of 

 ironstone — vegetable impressions, and an underlie of ferruginous and 



carbonaceous clay — selenite common 20 ? 



b. White sand 2 feet, to which succeeds ochreous sand 1 to 2 feet, pass- 

 ing down into light greenish sand* : no fossils 25 ? 



a. Green and ferruginous-coated flints in greenish sandf 2 



Chalk to base of cliff . 87 



The organic remains I have found in this section are as follows : — 



Cyrena cuneiformis, Fer. Melanopsis buccinoides, Fer, 



intermedia, Mell. ? Ostrea Bellovacina, Desk. 



Cerithium variabile, Desk. Psammobia Condamini, Mor. 



Dreissena serrata, Mell. ? Unio. 



Hydrobia Parkinsoni, Mor. ? Cypris ? 



Melaniainquinata, Desk. 



Leaves of plants figured by Dr. Mantell (in Stratum c). 



Dr. Manteli also mentions the occurrence of the Avicula media, Sow., Helix Icevis, 

 Flem., and Cytherea convexa, Brong. (probably the Dreissena, Hydrobia, and Cy- 

 rena cuneiformis of the above hst), and Fish-teeth resembling those of the Mustelus. 



In addition to these there are in the collection of the Geological Society some 

 curious specimens, apparently of cones and seed-vessels, found by Mr. Warburton. 

 These beds require further investigation. 



In consequence of this being a distant outlier, and of the absence 

 therefore of connecting links, the relation of these fossiliferous grey 

 clays and thick beds of sand to the mottled red clays of the Isle of 

 Wight is not readily apparent. That they are in reality synchronous 

 will be further on shown to be probable, by analogous changes in the 

 same division in the London district. 



The few foregoing observations merely give a sketch of this group 

 in Hampshire. The rarity of sections and want of time have pre- 

 vented me from working it out so fully as I could have wished. It 

 will serve, however, to show the relation of this portion of the series 

 to that of the same age in the London district, and which I purpose 

 treating in greater detail. The number of sections exposed to the 

 westward of London along both the north and south lines of out- 

 crop of the Lower Tertiaries renders this a work of comparative 

 facility, until we arrive in the neighbourhood of London. The chalk 

 tract separating the Hampshire Tertiaries from those of the London 

 district at their nearest point of approach is about twenty miles 

 broad. 



London Disti'ict. — In entering upon this area we find the middle 

 division of the Lower London Tertiaries resuming its position with 

 characters almost identical -with those under which it outcrops in the 

 neighbourhood of Salisbury, as the two following sections will show : — 



* At Seaford this sand contains masses of rough ferruginous sandstone con- 

 cretions : and the flints of stratum a beneath it are often cemented into consider- 

 able-sized blocks. 



f It is at the base of this bed that the Websterite and hydrate of alumina 

 occur. 



