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ON ERRATIC BLOCKS OF THE BRITISH ISLES. 
Rushton— 
Mountain Limestone, with encrinites and brachiopods. 
Carboniferous chert, Bunter pebbles, Chalk, and flints. 
North of Great Oakley— 
Mountain Limestone. 
Nortuampton.—Corby Brickworks.—Large proportion of Carboni- 
ferous boulders, including Mountain Limestone, chert, Millstone Grit, 
and ganister. Lias limestone, Great Oolite, indurated Northampton 
Sands, Trias pebbles, and one specimen of mica schist, 3 inches diameter. 
Reported by Professor P. F. KENDALL. 
Brick-pit near Racecourse (in Chalky boulder clay)— 
Spilsby sandstone. 
LEICESTERSHIRE. 
Reported by Mr. J. Lomas. 
East Norton Railway-cutting— 
Carboniferous Limestone. 
Millstone Grit. 
Carboniferous chert. 
Owston Gravel-pit— 
Chalk, flints, Lias limestone, Oolite, Bunter pebbles. 
Knossington.—Many boulders of Carboniferous limestone and Mill- 
stone Grit. 
Wymondham.—Old Brickworks near Station— 
Mountain Limestone, Chalk, flints, Bunter pebbles. 
Oolite, and many Lias limestones. 
Coston Bridge— 
Coarse dolerite, 3 feet diameter, 
Fine-grained dolerite, 1 foot diameter. 
Oolite, 2 feet diameter. 
Mountain Limestone. 
Marl-pit, near Saltby— 
Great number of Bunter pebbles, Oolite; no Lias. 
Quarry, behind Saltby Church (406 O.D.)— 
Lincolnshire Oolite ; no Chalk. 
Oolitic sandstone. 
Wykeham.—Felsitic ash from Charnwood, 2 feet 6 inches diameter. 
This boulder has been identified by Professor Bonney and is recorded in 
the Survey Memoir. 
