LINGULID&. 49 
Position and Locality. The position has already been explained. It occurs on the 
Old Leominster Road, near Ludlow; at Downton Castle; near Lesmahago, in Lanark- 
shire, &c. 
(?) Lineuna Ramsayt, Salter. Pl. III, figs. 49 —52. 
Lineuta Ramsay, Salter. Siluria, p. 55, Woodcut foss. 10, fig. 20, 1859. 
Spec. Char. Ovate, longer than wide; sides slightly convex, merging posteriorly 
by a gentle curve into the acuminate beak, and anteriorly into the more or less 
rounded front; valves very slightly convex. External surface finely reticulated, the 
radiating raised lines being crossed by still finer concentric ridges, and thus leaving 
minute quadrangular spaces between them. Dimensions variable; a large specimen mea- 
sured about an inch in length by something less in width. 
Obs. Mr. Salter had no opportunity to describe his species; but he gave it a name, 
and placed a reduced figure of it among the characteristic fossils of the Llandeilo flags, 
in ‘ Siluria,’ 2nd edit. Although I have seen a good number of specimens of this species, 
none exactly retain their true shape, and I am not quite sure about its real form, the 
shells being usually flattened and distorted, from the effects of pressure, cleavage, and 
fossilization. ‘The external surface is rarely preserved, so that a further search for better 
examples would be very desirable. This species is very abundant in the only locality 
known. 
Position and Locally. L. Ramsayi occurs in black Llandeilo flags at Abereiddy Bay, 
Pembrokeshire; specimens may be seen in the Museum of the Geological Survey, 
London. 
Linevra tata, Sow. PI. II, figs. 40—44. 
Lineua Lata, Sow. Murchison’s Silurian System, p. 618, pl. viii, fig. 11, 1839; and 
Siluria, 2nd edit., pl. xx, fig. 6, 1859. 
— — M'‘Coy. British Pal. Foss., p. 253, 1852. 
Spec. Char. Shell small, ovate, longer than wide; sides slightly convex, and gradually 
converging into the rounded slopes which form the obtusely angular beaks ; front gently 
rounded ; valves very slightly convex. Surface marked with fine concentric lines of 
growth. Length 3, width 2 lines. 
Oés. This important little shell is described by Sowerby as “ obovate, flat, smooth ; 
front edge truncated; width about 2 lines, length 3 lines. Zoc., Ludlow escarpment, 
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