A memoir by my friend Mr. Davidson, in vol. xviii. p. 25 of the Quarterly Journal of the Geological Society, contains the description of the fossil Brachiopoda discovered in the Punjaub by Messrs. A. Fleming* and W. Purdon. The determination of these fossils could not have been confided to better hands. A great number of the species were susceptible of being identified with European and American Carboniferous species, some are new, and others do not possess the palæozoic aspect which a somewhat experienced palæontologist easily perceives among the fossils of the Carboniferous period. That which occurs in connexion with the Brachiopoda may be remarked likewise among the fossils of other classes which accompany them, and the description of which has been confided to me by their discoverer. Among these fossils, certain species belong to genera that have hitherto only been found in the Secondary formations, and occur principally in the lower groups of that great geological period. Such, above all, are the Ceratites, which appear to be tolerably abundant in a rock of the Punjaub Salt-range, and are remarkable from the fact that they are all new to science. But for this last circumstance, one might have entertained serious doubts relative to their geological position, although Dr. Fleming had ascertained by personal examination that they occurred in the same beds as those which contained the Carboniferous Producti and Spiriferœ. At all events there is still this remark to make, that the rock which contains the Ceratites has not shown me