On some Remains of Chiton from the Mountain-limestone of Yorkshire

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Abstract
The remains of Chiton noticed in the present paper were sent to me for examination about two years ago by Mr. H. J. Burrow, of Settle, with permission to describe them should it appear to me desirable to do so. Not being able to identify any of them with species already described, I agreed to draw up a short account of them, so as to make their discovery known. My delay in doing this is mainly due to an expectation of the discovery of additional materials; but as this expectation has not been realized, it will be well, perhaps, not to withhold their description any longer; for though the plates already known may probably give but a very imperfect idea of the species to which they belong, they certainly seem of sufficient importance to allow of their being brought before the attention of palæontologists. There are eight plates in the collection, four of which are posterior plates, and the others intermediate; and, notwithstanding the smallness of their number, they appear to belong to four species. That so many species should be represented by so small a number of plates, all from one locality, seems, I must confess, somewhat remarkable; but the differences of the characters of the plates are such as to render it scarcely possible for them to belong to less than the number of species named. The specimens were found in the Lower Scar Limestone, in the vicinity of Settle, and apparently near the base of that subdivision

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