570 T. R. JONES AND J. W. KIRKBY ON 
In England and Wales. Yoredale Rocks: Whorlton and Barnard 
Castle, in Durham. 
Carboniferous Iamestone: Weardaie, Durham; Wyebourne, Cum- 
berland ; Settle, Yorkshire ; Great Ormes Head, Caernarvonshire ; 
Backwell and Charterhouse, in Somerset; Weston-super-Mare, 
Somerset; Brocastle, South Wales. 
In Scotland. Carboniferous Limestone (Upper): Pathhead, Fife ; 
Levenseat Limestone-Pits, Edinburghshire; Gare, Carluke, and 
Robroystone, in Lanarkshire; Garple Burn (Muirkirk), Williams- 
wood near Cathcart, and Orchard near Pollokshaws, in Renfrew- 
shire; Swindridge and Highfield (Dalry) in Ayrshire. 
Carboniferous Limestone (Lower): Pitlessie Limeworks, coast 
near Ardross, and coast east of St. Monans, in Fifeshire; Darcy 
Quarry, Currielee Limeworks, Magazine Limeworks, Causland, 
West Mains Farm (Baads), Mount Lothian, Fullarton, Bents, 
Mansfield, all in Edinburghshire; Prestongrange, East Lothian ; 
Galabraes, Linlithgowshire ; Calderside, South Shiells, East Drunn- 
loch, Shield’s Farm (Kast Kilbride), High Blantyre, Brockley 
(Lesmahagow), Carluke, Brankumhall Quarry, all in Lanarkshire ; 
Corrieburn (Sculliongeur), Craigenglen, Campsie, in Stirlingshire ; 
Broadstone, Howrat (near Beith), Craigie (Kilmarnock), in Ayrshire ; 
Campbeltown, Argyleshire. 
Calciferous Sandstone: Coast near Randerstone ; coast east of Pit- 
tenweem, and coast west of Pittenweem, Fifeshire; Donkin’s 
Quarry, near Keclefechan, Dumfriesshire. 
3. Barrpia Histnenri, Minster. Plate XXIX. figs. 4-10. 
Cythere Hisingert, Minster, 1830, Jahrbuch fur Mineralogie, 
p. 65. 
Bairdia Schaurothiana, Kirkby, 1858, Annals Nat. Hist. ser. 3, 
vol. u. p. 329, pl. x. fig 14. 
Cythere Schaurothiana, Geinitz, 1861, Dyas, p. 36. 
Cythere (Bairdia) Schaurothiana, Kirkby, 1862, Ann. Nat. Hist. 
ser. 3, vol. x. p. 208, pl. 4. figs. 1-12. 
Bardia Hisingeri, Jones & Kirkby, 1865, Ann. Nat. Hist. ser. 3, 
vol. xv. p. 408, pl. xx. fig. 12. 
Subrhomboidal in outline; convex: length rather more than 
twice the height. Dorsal border straight or slightly convex in the 
middle portion, with an easy slope to the anterior extremity, and an 
abrupt one to the posterior extremity; ventral border incurved 
anteriorly, and rounded towards each end. Anterior extremity 
broad, rounded, and overhanging above; posterior extremity pro- 
jecting (ram-like), subangulate, or slightly rostrated. The left 
valve overlaps the right strongly along the dorsal border ; also along 
the ventral border, where a flange projects about the anterior third. 
Surface smooth. Muscle-spot placed near the centre of the valve, 
and formed by a central dot, surrounded by eight or more others, 
all of whieh are somewhat raised above the surface of a shallow 
circular excavation. Length =, inch. 
