ave REPORT—1899, 
Tur Coat Measures.—With regard to the sequence of coal meastites 
in the various districts, I would refer to my schemes with the horizons at 
which the molluscs occur, printed in Part II. of my monograph on the 
British Carbonicola, Anthracomya and Naiadites. 
The species of the genus Anthracomya seem to me particularly useful 
in each coalfield as denoting zones which I have more particularly worked 
out in the North Staffordshire coaltield, the upper coal measures con- 
sisting of red measures with sandstones, ironstones, a few corals and spirorbis 
limestones. The latter are, however, found almost to the base of the 
North Staffordshire coalfield. The typical shell of the lower part of this 
series is Anthracomya Phillipsii, which passes down to the Knowles Iron- 
stone, below which it is not found. In the North Staffordshire and 
Manchester coalfields, a small shell, Anthracomya calcifera (Hind), appears 
to denote a zone some 300 yards above the zone of A. Phillipsi. In the 
North Staffordshire coalfield this zone occurs just below the Penkhull 
sandstone, hitherto mapped as Permian by the Geological Survey. 
Anthracomya minima is typical of the Knowles Ironstone. 
Anthracomya Adamsii and A. pulcra, confined to the Burnwood or 
Little Mine Ironstone. 
Carbonicola turgida, typical of a bed a few yards above the moss 
coal. 
Carbonicola nucularis, C. cuneiformis, Anthracomya Williamsoni, 
A. subcentralis, only found in roof of Hardmine coal. 
Carbonicola similis is found only about the horizon of the Cockshead 
coal. 
The genus WVaiadites comes in with the Knowles seam, and is found at 
several horizons below this to the base of the Coal Measures. 
The gannister series appears to be absent in North Staffordshire, unless 
it is represented by thin beds with Aviculopecten papyraceus about the 
Stinking Coal, Cheadle and Froghall, and over the lower coals of Wetley 
Moor. 
The Hutton cannel seam of Wigan is characterised by a bivalve like a 
Schizodus (the Tellinomya of H. Bolton), probably unfilled casts of 
Carbonicola turgida, and the Arley mine by Carbonicola robusta. 
The Millstone Grit series appears destitute of molluscan remains, the 
beds thin out to the south-west, only two remaining along the west flank 
of the Pottery coalfield. 
Four important marine bands occur in the North Staffordshire coal- 
field, one high up over the Bay mine, with 
Aviculopecten, sp. Macrocheilus 
Nucula, sp. Nautilus 
Discina, sp. Productus 
Lingula, sp. Spirifer 
Another over the Gin mine— 
Orthoceras, sp. Spirifer 
Discites, sp. Productus semireticulatus 
Goniatites, sp. Chonetes Laguessiana 
ELuomphalus Nucula gibbosa 
Pleurotomaria, sp. »  wndulata (2) 
Loxonema; sp. Schizodus, sp. 
Bellerophon, sp. Solenomya primeva 
Macrocheilus, sp. 
