15 
jacent zones can best be studied in this neighbonrhood ; 
the lower Lias (the lima beds) at Messrs. Greaves and 
Bull’s quarries at Stockton and Harbury, and a remark- 
ably fine section is exposed in the railway cutting near 
Harbury Station. This portion of the series is also 
largely quarried at Rugby, and in other places south 
and south-east of Stratford. Taking the Harbury 
section as the type which fairly represents the rest, we 
have the following succession, viz., six beds of white rubbly 
limestone, divided by clay ; two feet of black shales, lime- 
stone with rhynchonella variabilis; one foot of dark shale; 
two feet of blue limestone, full of fucoids; ten beds of 
limestone, divided by shale ; three feet of shale; three feet 
of thickest bed of hard blue shale; two feet of irregular 
masses of limestone, embedded in shale four feet ; five beds 
of limestone, divided by shale, resting probably on shales 
which are concealed by debris. The fossils are not very 
numerous, but the following marine shells occur :— 
Gryphea incurva, Ammonites augulatus, Nautilus, Perna, 
Lima gigantea, and L. Hermanni, Pecten, Pradoanus (a 
Spanish Liassic species new to Britain), Pectens, Cardium, 
Amphiedesma, Rhynchonella variabilis, which occurs in 
a band towards the top, and a zone of fucoids. One coral 
Septastrea Fromenteli and one fish only have been detected, 
and very few remains of Saurians, chiefly bones and teeth 
of Plesiosaurus rugosus and Ichthyosaurus. Ammonites 
Bucklandi, and Couybeari which characterize this zone in 
Gloucestershire, Somerset (Bath and Bristol), and: else- 
where, do not occur here, at least they have not yet been 
recognised. They have, however, been discovered’ at 
Rugby with other shells, which do not occur at Harbury, 
and one or two species of Saurians. The thickness of the 
Lias in Gloucestershire is probably not much less than 
1,000 feet, but in Warwickshire, where the upper Lias is 
S 
