HEADON BEDS. 45 I 



lying deposit. True Amber is a fossil resin which is the product of the extinct 

 Conifer Pinites sitccinifer. Remains of a Spider and several Flies have been 

 obtained from the Norfolk Amber, and Mr. Reid suggests that the specimens have 

 been derived from Upper Eocene or Oligocene deposits, which form an extension, 

 beneath the German Ocean, of the well-known Amber-bearing beds of the Baltic 

 shores of Prussia.' 



HEADON BEDS.2 



These beds, named by Prof. E. Forbes from their occurrence at 

 Headon Hill, on the west of the Isle of Wight, consist of green 

 shelly sands, clays, marls, and limestones, which have been sub- 

 divided as follows : — 



Upper Headon Beds. 



Middle Headon Beds | S°^^^^^ Bay Marine Bed. 



I Brockenhurst Beds. 

 Lower Headon Beds. Hordwell Beds, etc. 



The total thickness of the Headon Beds varies from 133 feet at 

 Headon Hill to 175 feet at Whitecliff Bay. 



Lower Headon Beds. 



These beds consist of sands and clays with lignite in places, and 

 are exposed at Headon Hill (67 feet) between Weston Chine and 

 Warden Cliff, and in Whitecliff Bay (40 feet). They contain a 

 Unio-bed with U. Solandri, and a bed of Limncea limestone at the 

 top (How Ledge Limestone)^ with L. longiscata and L. fusifonnis. 

 Cyrcna cycladifonnis is a marked shell in this division, which 

 exhibits fresh- and brackish-water conditions : among other species 

 we find Plaiiorbis euomphaltis, Paliidina lenta, Pofamomya plana, and 

 Poiainides cincttis. 



Hordwell Beds. — At Hordwell remains of Spalacodon (an insecti- 

 vorous INIammal), also the Mammals Anthracotherium, Paheo/herium 

 {Paloplofherhun), Diddphys, Thcridomys, Hyccnodon and Viverra 

 Hastingsi(z have been recorded from the Lower Headon Beds, 

 together with a Bird, Macivrnis, and remains of Crocodilus 



1 Trans. Norfolk Nat. Soc. iii. 601, iv. 247 ; see also P. B. Brodie, Rep. 

 Warwicksh. Nat. Hist. Soc. 1871, and S. V. Wood, Supp. to Crag Mollusca. 



* The Upper, Middle, and Lower Headon Beds correspond respectively with 

 the Upper Freshwater, Upper Marine, and Lower Freshwater formations of 

 Webster, terms adopted from Cuvier and Brongniart, Desc. Geol. des Env. de 

 Paris. See also Lyell, T. G. S. (2), ii. 2S7 ; and Bowerbank, Ibid. vi. 169. 



^ Keeping and Tawney, Q. J. xxxvii. 98 ; see also H. W. Bristovv, Geol. L of 

 Wight, p. 62. 



