730 PROF. REYNOLDS AND MR. VAUGHAN ON THE  [ Noy. 1902, 
(a) The Capricornus-Zone and Marlstone. 
Lithologically, this series consists of clays and sandy beds con- 
taining many nodules, with 
an occasional band of fossili- 
ferous limestone. In the 
limestones Ainmonites capri- 
cornus occurs somewhat 
plentifully, as also does 
Avicula inequivalvis. At ‘ 
the base of the series, almost 
immediately above the Mu- 
mismalis- and Belemnite- 
Shales, a specimen of Lyto- 
ceras (att, fimbriatum) has 
been found. 
This series is capped by 
a considerable thickness (at 
least 10 feet) of (1) sandy, 
(ii) marly, and (111) ironshot 
limestones, all of which are 
very rich in fossils. 
(i) In the hard sandy 
beds <Avicula inequivalvis 
and Cucullea sp. are abun- 
dant, associated with a 
small, convex, smooth 
Pecten; Ammonites capri- 
cornus occurs in these beds, 
and good specimens can be 
obtained. 
(ii) In the marly lme- 
stone - beds specimens of 
Ostrea irreqularis? (anoyster 
of the vesiculose type) 
form an actual oyster-bed ; 
and with this oyster are 
associated mutations of Car- 
dinia Listert. 
(ii) The Marlstone 
(ironshot limestones), 
—Lithologically, this is the 
typical marlstone of the 
UPPER GREAT 
OOLITE 
10 times the horizontal. | 
(The asterisk (*) marks the 10 feet of Upper Lias.) 
1 inch = 2000 feet ; vertical scale 
COTTESWOLD SANDS. 
# 
{[ Horizontal seale : 
Section through Sodbury Tunnel, 
INFERIOR 
~ district, and consists of a 
Sb coarsely ironshot, marly, 
3 limestone, blue when freshly 
brought to the surface, but 
becoming brown on ex- 
posure to the ait... Tt 
contains Pecten cequivalvis 
LR. LIAS 
400 
UPR, BEDS 0 
