DAVIS : SECTIONS IN THE LIASSIC AND OOLITIC ROCKS OF YORKSHIRE. 193 
Modiola cuneata, Sow. Cardium punctura, Bean. 
Cucullasa cancellata, Phill. Cheranitzia lineata, Leek. 
Macrodon Hirsonensis, D'Orb. Neiinsea cingenda, Bronn. 
Trigonia denticulata, Ag. Cerithium (2 species). 
var. costata, Lycett. Alaria Phillipsii, D'Orb. 
„ spinulosa, Y. &. B. Onustus pyramidatus, Phill. 
Cypricardia acutangula, Phill. Nerita laevigata, Phill. 
Tancredia axiniformis, Phill. Trochotoma sp ? 
Cardium striatulum. Sow. Actseonina sp ? 
The Terebratula Bed (5) consists of two feet of soft brown or 
yellowish sandstone, full of fine casts of Terebratula trilineata, Y. 
and B., other fossils being small and mostly found in nests. This 
appears to be the lowest bed found in any other locality, and the 
remaining strata are unique in this section. Trigonia and other 
fossils are associated with the Terebratula. At the base of No. 9 is 
a thin stratum of sandy nodules, almost composed of Lingula Beanii, 
and known as the " Lingula Band " (10). They are readily 
observable at the foot of the cliff at its northern extremity at Blea 
Wyke, and other bands of a similar nature occur lower down. They 
are the uppermost beds of the Lias. The lower beds are not easy to 
observe, because they are under water except at unusually low spring 
tides. From the occurrence of A. striatulus and A. Jurensis in these 
shales they have been variously named the " A. striatulus beds" and 
the " A. Jurensis shales" The whole of the Dogger Series thin away 
very rapidly towards the Peak, and their course is stopped by the great 
Peak Fault (fig. 6). The ferruginous beds with the characteristic 
doggers again appears in the Peak Alum Works, from whence its out- 
crop may be traced to Howedale Beck, after which it is covered by the 
Boulder Clay. 
The Lower Estuarine Beds are of freshwater origin, and at Blea 
Wyke consist of alternating beds of shale and sandstone, with three 
beds of thin coal attaining a thickness of 160 feet. A bed of soft 
ferruginous sandstone occurring at a height of 50 or 60 feet from the 
base of the series contains vertical stems of plants often five feet in 
height, which are probably the remains of Equisetites. At the 
summit of the Lower Estuarine Series is the Eller Beck Bed, so 
