22 Hind: Life Zones tn British Carboniferous Rocks. 
This is a large and curious fauna to find high up in the 
Pendleside series, but although elsewhere in the Midlands this 
bed has not been positively identified, other rich faunas occur 
in the grits at higher horizons at Pule Hill and in the neighbour- 
hood of Pateley Bridge. 
Owing to the fact that the Millstone Grits are thinning out 
along Congleton Edge, the exact horizon of the shell bed here 
is equivocal. 12 miles N.W. the grits are in full force, and 
consist of 5 beds :—Rough Rock, 2nd Grit, 3rd or Roches Grit, 
Kinderscout Grit, and Farey’s or the Pendle Grit; at Congleton 
Edge only two grits are present, and these are thin. They are 
presumed to represent the 1st and 3rd Grits. It may be that 
the Crow stones immediately below the fossil bed represent 
Farey’s Grit, but the presence of G. spirale and G. diadema 
points to a Pendleside facies rather than Millstone Grit. 
Glyphioceras diadema has a broad horizontal distribution. It 
occurs in profusion in the North of County Clare, some 2-4 feet 
above the top of the Carboniferous Limestone. I have suggested 
that here the Poszdonomya becheri beds are absent owing to an 
overlap of higher beds. (Proc. Roy.-Irish Acad., Vol. XXV., 
section B., pp. 93-116.) 
At Chokier, Belgium, the same fauna occurs, and it is in- 
teresting to note that in each of these localities, ordinary 
specimens of G. diadema are accompanied by a variety with 
very coarse ribs and a wide umbilicus. (Op. Supra. czt., pl. vi., 
figs. 10-11.) 
The Zone of Glyphioceras reticulatum (maximum) requires 
working out in more detail. In the Postdonomya bechert beds 
it appears first as a large shell with coarse reticulate marking. 
Higher up, and probably below the maximum of G. spzrale, it 
occurs in profusion in some localities, persists through the grits, 
appearing in force in the shale below the 3rd grit at Wadsworth 
Moor and Eccup, near Leeds. In the Pendleside series it is at 
its maximum in the black shales and nodular limestones of the 
Pendleside series, of Horsebridge Clough and High Green 
Wood, near Hebden Bridge. 
The fauna here contains the following :— 
Brachiopoda. | Posidoniella minor. 
Productus (scabriculate form). | 5 variabilis. 
Lamellibranchiata. Schizodus antiquus. 
Pterinopecten papyraceus. Sanguinolites cf. sulcatus. 
Posidoniella levis. Nucula equalis. 
"3 kirkmant. Letopteria longtrostris. 
Naturalist, 
