ON ERRATIC BLOCKS OF THE BRITISH ISLES. 255 



B.A., F.G.S., of the Geological Survey of Scotland, to whom Mr. Muff 

 submitted them : — 



Bobiri Hood's Bay.— Several beach boulders of andesites, porphyrites, 

 and lamprophyres of Old Red Sandstone age from the Cheviot, Pentland, 

 or Ochill Hills. 



? Old Red Sandstone, Scotland, 1 specimen. 



' Haggis ' Rock, northern edge of Southern Uplands of Scotland, 1 specimen 



in Upper Boulder Clay. 

 Red Jasper (radiolarian chert), Southern Uplands of Scotland, beach 



boulder. 

 Leny grits, Highland schists, Perthshire; 1 specimen in Upper Boulder 



Clay ; I specimen in beach boulder. 

 Epidiorite, Highland schists, Perthshire ; 1 specimen, beach boulder. 

 Moine schist, Highlands, 1 specimen in Upper Boulder Clay. 



Whitby.— 



Lower Old Red Sandstone, Scotland ; 1 specimen in Lower Boulder Clay. 

 Ophitic dolerite (coarse), similar to the sills of Carboniferous age in the 

 'Midland Valley ' of Scotland; 1 specimen, beach boulder. 



Stonegate, Erhsdale. — 



Queensbury grit, Southern Uplands of Scotland ; 1 specimen ; Leny Grits (?) 

 1 specimen. 



Egton Brickworks, Eskdale, — 



Ben Ledi grit, Highland schists, Perthshire, 1 specimen in Boulder Clay. 

 Most of these boulders have been sent to the Hull Municipal Museum, 



Hull Geological Society. 



Report of the Boulder Committee, August 1902. 



Barton-on-Humher. — Quarry in glacial gravels, \ mile west of the 

 town. Gravel consists mainly of local chalk and flint, but foreign rocks 

 also occur as follows : — 



2 coarse conglomerates, 18 in. in diameter. 

 1 glaciated basalt, 18 in. „ 



1 Cheviot porphyrite, 12 in. „ 



Amongst the smaller foreign pebbles Cheviot porphyrites are the 

 most common, but magnesian limestone (Roker type), greywackes 

 basalts, Carboniferous limestones, and lias also occurred. 



Reported by Rev. E. Maule Cole, M.A., F.G.S. 

 Driffield, in the Highfield Quarry. 

 Rhomb porphyry. 



Reported by G. W. B. Mactubk. 



Bluestone Bottoms, near Little Weighton. — In this wold valley, at an 

 elevation of 250 feet above O.D., numbers of drift pebbles occur, Cheviot 

 porphyrites being especially abundant. 



