HASTINGS SANDS. 
317 
Fig. 293. 
Lepidotus Mantelli, Agass. Wealden. 
a. Palate and teeth. 6. Side view of teeth, c. Scale. 
Fig. 294. 
Unio Valdensis^ Mant. Isle of Wigh t and Dorset 
shire; in the lower beds of the Hastings Sands. 
ganoids were allied to the Lepidosteiis^ or Gar-pike, of the 
American rivers. The whole body was covered with large 
rhomboidal scales, very 
thick, and having the ex¬ 
posed part coated with 
enamel. Most of the spe¬ 
cies of this genus are sup¬ 
posed to have been either 
river-fish, or inhabitants 
of the sea at the mouth 
of estuaries. 
At different heights in 
the Hastings Sands, we 
find again and again slabs 
of sandstone with a strong 
ripple-mark, and between 
these slabs beds of clay many yards thick. In some places, 
as at Stammerham, Fig. 295 . 
Horsham, near there, 
are indications of this 
clav havino^ been ex- 
posed so as to dry 
and crack before the 
next layer was thrown 
down upon it. The 
open cracks in the 
clay have served as 
moulds, of which casts 
have been taken in 
relief, and which are, 
therefore, seen on the 
lower surface of the 
sandstone (see Fig. 
295). 
Near the same place a reddish sandstone occurs in which 
Under side of slab of sandstone about one yard in 
diameter. Stammerham, Sussex. 
