TRIASSIC DEPOSITS AT EMBOROUGH. 
115 
The lower and chief Bone Bed is not seen in any of the 
excavations which are at present open, but it was met in run- 
ning a trench north from excavation No. 11, Many excel- 
lent blocks lie about on the bank by the trench. The bone 
bed here is a very interesting development and crowded with 
fossils. We have obtained from it Ac7^odus minimus (teeth 
very common), Saurichthys acuminatus (teeth very com- 
mon), Hybodus raricostatus (teeth), Sargodon tomicus 
(teeth), Sphcerodus minimiis (teeth), Gyrolepis alherti 
(scales), Plesiosaurus costatus (vertebral centrum). We 
however found no trace of Ceratodus. 
A small excavation (13) north of the last and close up 
against the hedge, shows about four feet of compact, mottled 
clay (bed n), and in the overlying surface soil are blocks of 
White Lias. The White Lias occurs m situ in the next 
field, a short distance beyond the hedge. 
III. Table showing the Beds. 
The whole Triassic series penetrated 
excavations is as follows : — 
in these various 
Upper 
Rlisetic, 
7 ft. 11 ill. 
Lower 
Rhsetic, 
7 ft. 2 in. 
Max. 
Thickness. 
ft. in. 
0. 
n. 
Compact pale or mottled clay . 
. 3 0 
yn. 
Hard grey sandstone, with Avicula con 
torta, etc. ..... 
4 0 
L 
Grey and pale shale .... 
. 0 8 
k. 
" Beef " band 
. 0 1 
J- 
0 2 
i. 
B 6 
It. 
Lower Bone Bed .... 
. 0 6 
Q- 
0 9 
/. 
False-bedded sandstone . 
. 2 0 
e. 
Conglomerate, with scales and teeth 
. 0 5 
