EXPLANATION OF THE PLATES. 71! 
Original. Under surface, Lower Ludlow, Leintwardine. Mus. G.S. I. 
LupLow.—Sil., 4th edition, p. 513. ‘Abundant and of all sizes in the 
quarry at Leintwardine.” Salter, op. cit., p. 331. 
MOLLUSCA.—BRACHIOPOD A. 
Fic. 5.—a, b, c. Lincuta Lewisu, Sowerby. 
Sil. Syst., p. 615, pl. vi., fig. 9. 
a. View of upper valve. 6. Side view of both valves. c. Interior. All from 
Mr. Davidson’s figures in Mon. Brit. Sil .Brach. Pal. Soe., pl. ii., figs. 
3 and 5. Aymestry Limestone, Sedgley, and near Ludlow. 
WenNLOock AND LupLow.—Sil., 4th edition, p. 525. ‘* One of the commonest 
species of the Middle Ludlow, or Aymestry Rock ;” ibid., pp. 227-8. 
‘It is stated to have been found in the Woolhope beds, Wenlock Shale, 
and Limestone, Lower Ludlow, and Aymestry Limestone ; but is most 
abundant in the last-named formation. It occurs also in the Upper 
Ludlow at Whitecliff, near Ludiow.” Brit, Sil. Brach., pp 355, 36. 
Prof. Phillips, in his memoir on the Malvern Hills, &c., states its oc- 
currence at various localities in the Malvern, Abberley, Woolhope, Usk, 
Llandeilo, and Freshwater Districts. Mem. Geol. Surv., vol. ii., pt. i., 
p- 275. 
Fic. 6.—a, 6. LINGULA CoRNEA, Sowerby. 
Sil. Syst., p. 603, pl. iii., fig. 3. 
a, b. From Brit. Sil. Brach., pl. ii, fig. 80, 34. Passage beds, Railway near 
Ludlow. 
LupLow AND PassaGeE Breps.—Sil., 4th edition, p. 525. ‘‘Abounds in the 
Tilestone of the Upper Ludlow;” ibid., p. 228. Jocalities: Tin Mill, 
Downton, Railway cutting north end of Ludlow ; Brockhill and Steven- 
ton Turnpike near Ludlow. Brit. Sil. Brach., p. 47. 
Fic. 7.—a, b, c. DiscINA RUGATA, Sowerby, sp. 
Orbicula. Sil. Syst., p. 610, pl. iv., fig. 47, 48, v., fig. 11. 
Discina. Sil., 4th edition, p. 524, pl. xx., fig. 1, 2, xxxv., fig. 27. 
a. Original. Lower or attached valve showing oval fissure. 
b. Original. Upper or free valve. 
ec. Original. Portion of surface enlarged, showing concentric ridges, Upper 
Ludlow, Hole Farm, Abberley. Mus. G. S. I. 
WENLOCK AND LupLow.—Sil., 4th edition, p. 524. ‘A common Ludlow 
species; ibid., p. 226. Localities: Ludlow Promontory, very abundant ; 
it occurs also in Upper Ludlow rock, at Ledbury ; and is frequent in 
Wenlock Shale, near Dudley. Brit. Sil. Brach., pp. 64-65. Prof. Phillips 
in his Memoir op. cit., records its distribution in Upper Ludlow and 
Aymestry Rocks of the Malvern, Abberley, Woolhope, May Hill, 
Tortworth, Usk, and Builth Districts. Prof. M‘Coy also states its 
occurrence in Upper Ludlow Rocks at Kendal, Westmoreland. 
