392 SPENCER : THE YOREDALE AND 
MILLSTONE GRIT ROCKS. 
Millstone Grits. 
01 
Si 
Fossils from the 
YOREDALE AND MILLSTONE GRIT SHALES. 
I-) 
-< 
Q 
Cd 
oi 
o 
>l 
Kinder. 
Third Grits. 
1 
J= 
bC 
S 
0 
PS 
*- r 
oj - 
•r 
5 *■ 
i ^ 
X 
Q 
Melania striata 
■?» 
reticulata... 
» sp. 
Posidonomya vetiistihs 
gihsoni 
sp 
Modiola elongata ... 
„ squamifera 
„ lingualis ... 
Aviculopecten jmpyraceous 
.5:- 
-X- 
„ hemisjihericus 
„ riigosus Phil. 
■v» 
sp 
•?» 
Pi'oductiis antiquus 
spimdosa 
semireticidatus ... 
4» 
