LOWER nRMTlQ-Contimied. 
STRATA EXPOSED IN CONSTRUCTING PILTON-AVONMOUTH RAILWAY. 11 
16 Upper Pecten Bed— 
Limestone, dark grey, fibrous 
calcite top. ■ Usually splits 
along the middle line, 
upper part marly, some- ^ 
times sandy ; lower part, 
hard, pyritic, & very shelly^ 
17 Shales, black, clayey in upper 
part, more perfectly lamin-^ 
ated below. Some pyritic 
layers and sandy courses. - 
V ery fossiliferous at several 
levels ... .. ... ^ 
18 Lower Pecten Bed— 
Limestone, blue, hard, pyri-' 
tous, fibrous calcite top, 
generally splits into two 
bands, the upper band very - 
shelly, the lower one sep- 
tarian, and often of a bone 
bed character 
1% (a) Shale, black, firm, thick- 
ly laminated, 9 ins. | 
Shale, hard, imperfectly 
laminated, not crumbly, t 
rusty joint planes, 1 ft. 6 ins 
(c) Shale, similar to a, Gins.j 
20 Marl, dark grey, micaceous ... 
21 Bone Bed— 
Shales, black, interstratifiedv 
with thin calcareous bands, 
gritty, pyritic, micaceous, 
containing’ scales, teeth, 
bones, coprolites, and peb- 
bles. Schizodiis and other 
Laraellibranchs abound in 
the upper part of the series. 
In the lower part the hard 
beds are thicker and more ) 
distinctly bone beds in 
character. Occasionally 
the intervening shales are 
missing, the hard beds 
merging into one thick 
band wdiich, at the western 
end of the section is a con- 
glomeratic bone bed similar 
to that at Aust ... ^ 
22 Shale, black, crumbly, earthy"^ 
in places j 
23 Large and very irregular 1 
nodules of brecciated lime- h 
stone, no fossils, 3 — 9 ins. | 
24 Shale, black, containing selen- 
ite. Fossils scarce ... 
I 
Ft. Ins. 
0 
/ 
6 
f Pecten valoniensis, de France. 
Pleurophoriis elongatus, Moore. 
Schizodus Ewaldi, Born. 
S. concentriciis, Moore. 
Myophoria poster a ^ Bronn. 
OJ 
Avicula contorta^ Portlock. (very 
common), 
Myophoria postera, Bronn. 
Schizodus Ewaldi, Born. 
Protocardiuin Phillipiammi, 
Dunk. 
Pleurophorus elongatus, Moore. 
P. angulatus, Moore. 
I Avicnla contorta, Portlock. 
! Pecten valoniensii, de France. 
I Schizodus Ewaldi, Born. 
Q concentricus, Moore. 
' 1 Pleurophorus angulaUis, Moore. 
Modiola minima. Sow. 
In places, bones, scales, teeth, 
and coprolites. 
2 
Fossils scarce, a few specimens 
oi Schizodus Ewaldi, Born., and 
Protocardium Phillipianum, 
Dunk. 
{ Gervillia proecursor, Quenst. 
Gyrolepis Alberti, Ag. 
Acrodus minimus, Ag. 
0 
, Schizodus elongatus, Moore. 
Schizodus, Sp. 
Gervillia prmcursor, Quenst. 
Mytilus cloacinus, sp. nov. 
Acrodus minimtis, Ag. 
Gyrolepis Alberti, Ag. 
G. tenuistriatus, Ag. 
„ ^ Saurichthys acuminatus, Ag. 
M Colobodus. 
Sphmrodus minimus, Ag. 
Hybodus rari'costatus, Ag. 
H. minor, Ag. 
H. cuspidatus, Ag. 
Nemacamthus monilifer, Ag. 
Rysosteus Oweni. 
.Reptilian teeth, Labyrinthodont 
bones, Coprolites, quartz pebbles. 
2 0 
0 6 
r Schizodus Ewaldi, Born. 
I Avicula contorta, Portlock. 
Q ^ I Protocardium, sp. (small speci- 
'j mens). 
Orbiculoidea ? 
I Gyrolepis. 
