Correspondence — Rev. 0. Fisher — Prof. T. Rupert Jones. 479 



cnssion as to the nature and origin of volcanic heat. I now decline 

 further discussion as to the charge of misrepresentation. I can 

 afford to leave that, as well as the truth of my own views, to " time, 

 the revealer." 



London, 24<A^i<(7MSi!, 1874. EoBEKT MalLET. 



ON THE ANTIQUITY OF THE WORKED FLINT FROM THE BRICK- 

 EARTH OF CRAYFORD. 



I am not surprised that a doubt should be thrown upon the an- 

 tiquity of the worked flint, which I found at Crayford in 1872.^ It 

 usually happens so when anything unexpected is discovered. It 

 appears to me, however, that there is but one escape from the ad- 

 mission that the implement is as old as the Thames valley brick- 

 earth, and that is to show that the entire deposit at Slades-green pit 

 at Crayford is re-assorted. The lines of bedding there are continuous 

 along the pit, and it was from one of these, about twelve feet from 

 the surface and six from the floor of the pit, that the flake was ex- 

 tracted. It was a layer of rounded pebbles, about five inches deep, 

 lying below the band with Cyrena tricjonula, and above the bone bed. 



I was struck by seeing the edge of a fiat piece of fiint protruding 

 from a layer of rounded pebbles, and therefore picked it out and found 

 it to be a " scraper." I instantly called Mr. Dawkins's attention to it, 

 and pointed out the hole I had made in extracting it. He said, 

 " Show it to Mr. Evans." I did so the next day, and Mr. Evans 

 pronounced it undoubtedly a worked fiint. In the note (p. 391) 

 where this find is referred to, Mr. Woodward also quotes Mr. Boyd 

 Dawkins's published mention of it, and then adds : " These may, 

 however, and probably did, belong to a later date," etc. I do not 

 understand why he says " these," for only one was found. 



0. FiSHEE. 



GTROGONITES, ETC., IN THE LONDON CLAY. 



Sir, — Believing that Gyrogonites (fossil seed-vessels of CJiara) 

 have not been hitherto noticed in the London Clay, I beg to mention 

 that Mr.' Joseph Wright, F.Gr.S., of Belfast, has lately favoured me 

 with some specimens found in the London Clay of Copenhagen 

 Fields, Islington, by Mr. John Purdue, when the Great Northern 

 Eailway cuttings were being made. These Gyrogonites, obtained 

 by washing the clay, were associated with thousands of Foraminifera 

 and many Entomostraca (see Geologist, vol. vii. p. 85; Monogr. Tert. 

 Entom., Pal. Soc. p. viii). They are referable to two species : one 

 is dark brown, ovoidal, and like Chara helicteres, Brongniart, as 

 figured in the Memoirs •Geol. Surv. Gt. Britain, Isle of Wight, etc., 

 1856, pi. 7, figs. 3, 4, but relatively longer; the other is light 

 brown, spherical, and like Chara Lyellii, ibid. fig. 7, but rather more 

 globular. There are five or six specimens of each species. 



From the same source, and by the kindness also of Mr. Wright, 

 I have Cythere plicata, Miinster, to add to the known fauna of the 

 London Clay. 



September 25, 1874. T. KuPERT JoNES. 



1 Geol. Mag. Dec. ii. Yol. L p. 391. 



