WILMORE : CARBONIFEROUS LIMESTONE ZONES. 
243 
The shales w ith thin Umestones of Swinden Gill, near Hellifield, 
are not Pendlesides, but are probably upper C or lower S. The 
shales above the disturbed white limestone of Crag Laithe are 
much higher and are probably upper S or D. The great thickness 
of shales between the knolls of Worsaw and Twiston (near 
DowTiham) and the Grits, include the greater part of D and the 
Pendlesides. 
These misconceptions having been cleared away, it w ould seem 
that the zonal sequence is, after all, a fairly normal one. There 
are certain local peculiarities, of course, but the general sequence 
is that of the rest of Britain and Belgium. 
Zaphrentis Zone. 
We may provisionally assign the lower beds of Horrocks- 
ford (Clitheroe), Brigg's Lower Quarry, the Quarry near Down- 
ham Church, Thornton Quarry and the lowest beds of Eshton 
Moor to this zone. After prolonged work in these beds I have 
been unable to find any Lithostrotion or Cyathophyllum or 
Clisiophyllids. I have only seen one specimen of a large Caninia 
and that was from Thornton Quarry (it was a badly crushed, poor 
specimen). 
The chief fossils are : — 
S3Tingopora reticulata Goldf. 
Michelinia cf. favosa (Goldf). 
Zaphrentis omaliusi M. E. and H. (very common). 
Zaphrentis delanouei M. E. and H. (not common). 
Productus cf. pustulosus Phill. 
Chonetes cf. hardrensis Phill. 
Leptaena cf. analoga (Phill). 
AthjTis cf. royssii (L'Eveille). 
Rhipidomella (Orthis) michehni (L'Eveille). 
Syringothyris Zone [C.) = Upper Tournaisian and Lower Visean. 
We may provisionally assign to this zone the beds wdth 
abundant large Caninia at Swinden Gill Head, Warrel, Bell Busk 
Station, Crags near Bell Busk, Winterburn Chapel, Owslin Barn 
and Hetton. The beds of Rain Hall may possibly be C, but no 
large Caninia seem to occur. Caninia cornucopiae Mich, is, how- 
ever, fairly common, and also in the similar beds at the bottom 
of the Gill Rock beds. 
