Ledbury Shales (Salter); part of “Tilestone” of Sir R. Murchison. 
TRANSITION OR PASSAGE BEDS. 
LEDBURY SHALES. 
These contain Cephalaspid fish. Plants 
and one or two Ludlow shells pass up into them, but the fish and crustacea are distinct from those of the 
Ludlow rocks. 
Having been generally included in the Silurian rocks, they are placed here as beds of passage between 
Silurian and Devonian. 

Case and 
Column of 
Drawers. 
Reference to McCoy’s 
Synopsis : and Figures of Genera, 

G9 
G97 
G97 
G9 
G97 
G97 
G97 
G97 
G9 
E02) 
G9 
G97 
G9 
G97 
G9 
G97 


Spongarvum? p. 42. 
Pl. 15, fig. 2, p. 185. 

Names and References; Observations, &c. 
Numbers and Localities. 

PLANTA’, 
Fragments of Plants—Lycopodiacex ? 
Plant Remains. 
Actinophyllum plicatum? Phill. (Mem. Geol. 
Sury. Vol. 11. pt. 1, p. 386, pl. 30, fig. 4). 
CRUSTACEA’. Phyllopoda. 
Leperditia marginata, Keyserling? 
Leperditia marginata. 
Leperditia, sp. 
Beyrichia Klodeni, McCoy. 
Fragments of Crustacea. 
CRUSTACEA. Merostomata. 
Eurypterus pygmeus, Salter (Siluria, 3rd ed. 
Foss. 67, fig. 1, p. 239). 
Pterygotus Ludensis, Salter (Mem. Geol. Surv. 
Mon. 1, pl. 14, figs. 1—13; Siluria, 3rd ed. 
Foss. 22, fig. 1, p. 140). 
BRACHIOPODA’. 
Lingula cornea, Sow. (Siluria, 3rd ed. pl. 34, 
fig. 2). 
PISCES'. 
Cephalaspid Fish. 
Fish spines, Onchus. 
1 These specimens were presented by Mr. R. Lightbody. 


io) 
. 84, Ludlow Tunnel. 
. 85, Ludlow. 
c. 86, Ludlow Tunnel. 
io) 
. 87, Ludlow Tunnel. 
io) 
° 
88, Ludlow Tunnel. 
. 89, Ludlow Tunnel. 
. 90, Ludlow Tunnel. 
. 91, Ludlow Tunnel. 
Q 
° 
ie) 
fo) 
. 92, Ledbury. 
c. 98, c. 98, Ludlow Tun- 
nel, 
le. 94, Ludlow Tunnel. 
c. 95, c. 96, Ludlow Tun- 
nel. 
c. 97, c. 99, Ludlow Tun- 
nel. 
25 
