DAVIS : SECTIONS IN THE LIASSIC AND OOLITIC ROCKS OF YORKSHIRE. 181 
contains A. fimbriatus, while the lower is a thin seam of clay-iron- 
stone, speckled white, with a layer of small Belemnites and Pectens 
at the base. A complete section of these beds may be examined on 
the shore and cliff's at the North Cheek of Robin Hood's Bay. They 
show the junction with the beds of A. Jamesoni (c) below ; and the 
upper beds, hard, sandy, and micaceous, and regularly jointed, 
gradually join up to those of the Middle Lias. In consequence of 
the jointed character of the upper rock, it falls and accumulates in 
large blocks on the shore ; such an accumulation may be seen on the 
north-west side of Peak Fault, fallen from an inaccessible position, 
containing more or less abundant specimens of A. capricornus, 
accompanied by small ferruginous doggers, sometimes formerly mis- 
taken for cannon balls. These beds are exposed in Tan Beck, above 
the Peak Alum Works, their junction with the Middle Lias Beds is 
also exposed in the same section. They may also be examined in 
Mill Beck and a gorge in Butcher Close Wood. 
The following section of the A. capricornus Beds is exposed 
half way between Baytown and North Cheek : — 
Ft. Ins. 
Thick band of Gryphcea, &c, the base of the Middle 
t v Lias ... . • ... _ ... ... 
Sandy shale, rather hard, with small doggers, en- 
closing A. capricornus ... ... .. 9 0 
Shales, with occasional bands of doggers... .... 37 0 
Shale, with A. fimbriatus, A. capricornus, &c. ... 8 0 
Shale, with nodular band, showing cone in cone 
structure near its base . ... ... ... 110 
Shale and thin dogger bands, with Gryphwa, Belem- 
nites, A. fimbriatus, A. Henley i, &v. ... ... 40 6 
Messrs. Tate and Blake give the following list of fossils obtained 
from the beds in the district cited above : — 
Fossil Wood. 
Gryphsea cymbium, Lam. ; var. depressa, Phill. 
Monotis insequivalvis, Sow. 
Crenatula (Inoceramus) ventricosus, Sow. 
Modiola numismalis, Oppel. 
Modiola scalprum, Sow. 
