174 LIAS OF ENGLAND ANp WALES : 
The band has been traced from Harby northwards by Redinile 
and Foston, but it nowhere in this neighbourhood attains a 
thickness of more than 5 feet, although it comprises two layers 
parted in places by a bed of clay 2 feet thick.* A well-boring at 
Allington Hall, N.W. of Grantham, was carried to a depth of 
181 feet in Lower Lias, below these hard bands. 
Above the ironstone-band there are dark blue clays with bands 
of stone, representing the zone of Ammonites oxynotus ; and sandy 
clays and thin limestones, representing that of A. armatus. These 
beds were exposed in a brickyard south-west of Broughton-on- 
Brant ; from the beds here Ammonites raricostatus has been 
obtained. 
Prof. Judd has recorded the following fossils from the hard 
ferruginous beds (zone of A. semicostatus), in the vale of 
Belvoir j : 
Ammonites semicostatus. 
Belemnites acutus. 
Cerithium iigaturale. 
subfistulosum. 
Pleurotomaria precatoria. 
Cryptaenia expansa. 
A mberleya imbricata. 
Astarte. 
Cardinia copides. 
gigantea. 
hybrida. 
Listeri. 
Cardium. 
Gryphaea arcuata. 
Lima gigantea. 
pectinoides. 
punctata. 
Pecten sequivalvis. 
lunularis. 
textorius. 
Pleuromya costata. 
Unicardium cardioides. 
Ditrupa capitata. 
Rhynchonella variabilis. 
ovalis. 
At Broughton Mills, beds considered to belong to the zone of 
Ammonites Jamcsoni, have been worked for brick-making, but as 
Mr. Jukes-Browne remarks " fossils are scanty and ill-preserved," 
and no distinctive species are recorded. 
A cutting at the foot of the tram-line belonging to the Eastwell 
Iron-works, showed bluish-grey shaly clays with small nodules of 
ironstone and cement-stone, and from these beds Mr. W. A. E. 
Ussher and myself obtained the following species, which were 
identified by Mr. SharmanJ : 
Ammonites brevispina (fragments 
abundant) . 
Belemnites (abundant). 
Avicula. 
Pecten lunularis. 
Plicatula spinosa. 
Unicardium cardioides. 
Rhynchonella. 
Pentacrinus. 
Ammonites capricornus was obtained from the clays and iron- 
stone-nodules, exposed in the railway-cuttings between Long 
Clawson and Harby, and at Barkston junction. The brickyard 
north-east of Woolsthorpe showed clays with ironstone concretions 
and septaria; beds probably near the junction of the zones of 
A. Jamcsoni and A. capricornus. 
The total thickness of the Lower Lias, as proved in a well-boring 
at Spittlegate, Grantham, may be estimated at about 700 feet. 
* Geol. S. W. Lincolnshire, pp. 29-31. 
t Geol. Rutland, p. 42. 
Geol. S.W. Linco!nshire, p. 32. 
Ibid., p. 143. 
