Hind: Life Zones tn British Carboniferous Rocks. 19 
which I consider to be at the base of the Culm series. It is 
associated there with Trilobites, and rare casts of corals, and 
an important lamellibranch Chenocardiola footit, that is found only 
in the base of Pendleside series in the Midlands and in Ireland. 
P. compressus occurs in the Carboniferous Limestones of 
Little Island, Co. Cork; Scarlett, Isle of Man; and Kendal, 
Westmorland; associated always with an upper Dibunophyllum 
fauna. 
In the Pendleside series I have obtained specimens from 
? Telia, N. Wales, the shales of the Hodder, at Hodder Place, 
Pendle Hill, Lancashire; Morredge, N. Staffordshire, so that 
in Prolecanites compressus we have the index of the junction of 
upper and lower Carboniferous rocks and Stroboceras sulcatum 
seems to have the same range. 
There is not always a cessation of the deposit of limestone 
associated with the faunal change, but the limestones associa- 
ted with the incoming Pendleside fauna are different in texture, 
cleavage, colour, and ring. 
The new fauna is characterised by the immediate appearance 
of Pterinopecten papyraceus, Positdonomya membranacea, P. 
bechert, Posidoniella levis and Glyphiocerus reticulatum, Nomts- 
moceras rotiforme, to mention certain members of a fauna which 
is given in full lower down. 
This faunal succession has been demonstrated at the follow- 
ing places :—In North Staffordshire ; at Pepper Mill, Wetton, 
limestones with Cyathaxonita and Amplexizaphrentis are suc- 
ceeded by Shales and Limestones with Plerinopecten papyraceus, 
Postdonomya bechert, Positdontella levis and Nomismoceras rott- 
jorme. At Mixon Hey P. papyraceus, Postdonomya bechert 
Posidoniella levis. A station in the River Hamps, near Onecote, 
yields Postdonomya membranacea and Prolecanites compressus at 
Tissington Station, Derbyshire, Pterznopecten papyraceus and 
Postdonomya bechert succeed the uppermost beds of the Car- 
boniferous Limestone. 
. In the river Hodder the same fossils are found as at Wetton, 
and in addition Prolecanttes compressus, Phillipsta pollent. The 
series exposed in the Hodder is a most interesting one, and I 
hope to publish a paper on the subject at an early date. In 
Yorkshire the P. dechert beds have been found succeeding the 
Cyathaxonia beds at the Cracoe fells. 
The same fauna is found at the following localities :—in 
the River Wharfe a little west of Linton Church, Linton; at 
Lothersdale; Mill Beck, near Hetton ; Dinckley Hall, R. Ribble; 
1907 January 1. 
