576 T. R. JONES AND J. W. KIRKBY ON 
niferous-Limestone series of Wyebourne, Cumberland; Weardale, 
Durham ; Charterhouse, Somerset ; and Scremerston, near Berwick- 
on-T' weed. 
In Scotland. Carboniferous Limestone (Upper): Climpy, Wilson- 
town, Lanarkshire. 
Carboniferous Limestone (Lower): Seafield Tower and Inverteil 
Quarry (near Kirkcaldy), Abden (Kinghorn), Roscobie and Charles- 
ton Quarry (near Dunfermline), Ladedda, Wilkinson, and Woodtop 
Quarries (near Cupar), Pitlessie Quarries, in Fifeshire; Hillhead 
Quarry (near Cockmuir Bridge), Blinkbonny Quarry, Brunston Col- 
liery, in Mid Lothian; Salton Limeworks, Kidlaw Quarry, Paiston 
Quarry, Cateraig Land Quarry and Burlage Quarry (near Dunbar), 
in East-Lothian ; Craigenglen (Campsie), Spouthead Burn, in Stir- 
lingshire ; Brockley (Lesmahagow), Braidwood (Carluke), in Lanark- 
shire; Bonshawburnhead Quarry, Dumfriesshire. 
11. Barrpra siniquvorpEs, sp.n. Plate XXXI. figs. 9-14. 
Siliquiform, or pod-shaped ; length from two and a quarter to less 
than three times the height. Dorsal border almost evenly arched, 
with the extremities nearly alike, the anterior being rather wider 
or less acute than the posterior; ventral border convex. Lateral 
contour plumply lenticular. Surface smooth? Length J, to j, inch. 
Most of the examples of this species which we have seen were 
collected by the officers of the Geological Survey of Scotland, from 
a shale of the Carboniferous-Limestone series, on the River Avon, 
Linlithgowshire. These specimens are all single valves, and do not 
show the hingement as well as could be wished. We have one 
specimen from a thin limestone of the Calciferous-Sandstone series 
of Fife, with the valves united, but not in such preservation as to 
display clearly the amount of overlap along the dorsal border. Still 
we have not much doubt of the species belonging to Bairdia; it is 
a well-characterized form, and comes nearest to the little-known 
Permian species Bairdia acuta, Jones. 
Localities.—Scotland. Carboniferous Limestone (Upper): River 
Avon, below Kinneil Mill, Linlithgowshire ; Kennox Water, Dou- 
glas, Lanarkshire. 
Calciferous Sandstone: Coast near Randerstone, south of Kings- 
barns, Fifeshire. : 
12. Barrpra ampurata, Kirkby. Plate XXXI. figs. 15-18. 
Bairdia truncata, Kirkby, 1858, Ann. Nat. Hist. series 3, vol. 1. 
p. 433, pl. x1. fig. 4. 
Cythere amputata, Kirkby, 1859, Trans. Tyneside F. C. vol. iy. 
pp. 155, 156, & 167, pl. xi. fig. 22. 
We have a single specimen from Paiston Quarry, East Lothian, 
that apparently belongs to the Permian species Cythere amputata, 
Kirkby. But this example is larger and in better condition than any 
Permian specimens (casts) we have seen; and it shows in the over- 
lap of the right valve by the left, along the dorsal edge, and in the 
rostrated form of the posterior extremity, that the species is more 
properly placed with Bairdia than Cythere. 
