Correspondence. 335 



discolouration. Kent has also lately yielded a number of specimens 

 to the careful search of Mr. W. Whitaker, F.G.S. ; some of these 

 are from the neighbourhood of Dover and Sandwich. 



Yours truly, 



George Dowkek. 

 Stoxjrmouth House, June IK/i, 1866. 



QUARTZ CONGLOMERATE BED. 

 To the Editor of the Geological Magazine. 



Sir, — There is at present on the shore at Gushendun in the County 

 of Antrim, a mass of extremely hard Conglomei'ate, some scores of 

 yards in length and breadth, and from thirty to fifty feet above the 

 sea. This is composed of round pebbles of quartz rock, from two to 

 four inches in diameter ; and they occur so closely packed, that every 

 one is in contact with another, and no room left, except for the 

 sand which cements them, and which fills the openings between the 

 pebbles, when originally heaped together. 



These pebbles, as just stated, are of qiiartz rock and therefore all 

 of one kind. There is no actual rock of the same kind, on the shore, 

 nearer than — 1. Malin Head, or Culdaff", in Donegal; 2. Belderg, east 

 of Belmullet in Mayo, where it occupies the shore for fourteen miles ; 

 and 3. in the twelve bins, near Clifden, in Connemara, where it forms 

 bands interstratified with Mica Slate. 



This mass is backed by a hill of brown Devonian grits and shales 

 interstratified, which extends from Gushendun to Gushindall. In 

 both those rocks are a few round pebbles of quartz rock, similar to 

 those in the mass on the shore, but in the rocks of the hill they are 

 thinly disseminated, perhaps six or ten of them to a cubic yard. 



Perhaps some of your numerous correspondents would liave the 

 kindness to explain how the pebbles of this mass were brought to- 

 gether, unmixed with pieces of rock of any other kind. 

 I am, Sir, Yours, etc., very truly, 



John Kelly. 



38, Mount Pleasant SauARE, Dublin, 22tli May, 1866. 



Probably all the other pebbles were of softer materials than quartz 

 and were consequently converted into mud and sand by the grinding 

 motion imparted to the mass by the sea, when the Gonglomerate 

 formed the shingle-bank of the ancient coast. — Edit. 



OBITTJ-A.S.'Z", 



Henry Darwin Eogers, LL.D., F.E.S.L. & E., F.G.S., Pro- 

 fessor of Natural History in the University of Glasgow, died on 

 Tuesday, May 29th, 1866. Though a native of the United States, 

 he was of Scotch extraction, and the member of a family tradi- 

 tionally devoted to the culture of the exact sciences. At the early 

 age of twenty-one he was appointed Professor of Chemistry and 



