As every attempt, however slight, to illustrate or investigate the Geology or Zoology of any particular district cannot fail to be of some service to science, I venture to submit to the Geological and Polytechnic Society of the West-Riding, a brief sketch of the Fossil Animal Exuviæ of the Yorkshire Coal Field. That the list which will be submitted to you is imperfect I feel fully persuaded, from my not having had the opportunity of ascertaining what the different collections in the neighbourhood contain. But it occurred to me, that if some individual prepared the skeleton of a catalogue, it might be amplified and rendered more complete by those whose information was more extensive, and thus form a synopsis worthy of the attention of a Society whose particular province it is to collect, collate, and register facts especially connected with the local Geology and History of the West Riding of Yorkshire, that being the kind of information which practical Geologists will naturally expect them as a body to supply; for it is by recording observations though in themselves apparently unimportant, that materials are furnished for more extended and valuable investigations.
The Coal Field, whose relics we have to consider, extends in length, as is pretty generally known, from Moor Allerton, North of Leeds, to Sheffield, and is there further extended into the adjoining counties of Derbyshire and Nottinghamshire; its greatest breadth, I believe, is between Halifax and Pontefract, about 20 miles. Throughout this extent of country, there are several distinct ...
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