have derived considerable assistance from his writings; which, by late botanists, have without sufficient reason been thought unworthy of notice.
In three or four instances, plants will be observed to want their specific names; these they consider as non-descripts, which, to the authors on English Botany who are in possession of specimens, they leave the task of delineating and describing A few, which are placed between brackets, are the production of Yorkshire, growing on the south bank of the Tees; but as the whole of them are of rare occurrence, and so very little beyond the range of their undertaking, this liberty will they trust claim the indulgence, if not the, thanks, of their botanical readers. To the friends whose liberal communications they have already acknowledged, the Editors must add the names of Mr William Backhouse jun. of Darlington, and the Rev. John Fenwick of Merton-House; and no common portion of gratitude is due to the distinguished assistance xthey have received from Dawson Turner Esq. of Yarmouth, through whose hands almost every species of moss here enumerated has passed,
