I Propose in this paper to give the evidences for the strati-graphical position of this interesting group, both because the task, so far as I am aware, has not been attempted in detail, and because American geologists themselves are not altogether agreed on the subject, some maintaining the equivalence of the group with our Ludlow, while there are a few who regard it as an easterly extension of the Niagara series of Western New York. Having had an extensive practical acquaintance with the fossils of New York, in the State Museum, and having supplemented cabinet study by work in the field, I venture to hope that I may be able to determine the question to the satisfaction of geologists.

The genus Meyeria was established by Prof. M'Coy, in 1849, for the reception of certain Crustaceans from the Gault and Greensand, found at Speeton, Yorkshire, and at Atherfield, in the Isle of Wight. A new form has been most obligingly sent to me for examination by Henry Willett, Esq., F.G.S.; and this being in a more perfect state of preservation than any heretofore obtained, enables me to refer to the same species about eight other remains from the Chalk preserved in the British Museum and including the carapace figured on pl. xxxviii. fig. 8 of Dixon's Geology of Sussex.

If an apology were needed for writing a few words upon the subject of the fossil fish of the Lebanon, mine would be this, that I have resided so near the well-known localities as to be able to visit them often and collect more and better specimens than have ever been found there before. Many and celebrated geologists and palæontologists have written upon the subject of the fossil fish found here, and yet the localities have been visited by few of those who have written best. The distinguished palæontologist F. J. Pictet published a volume in 1850, and another, together with M. Alois Humbert, in 1866, in which are found interesting histories of the localities Hâkel and Sahel Alma, and most excellent and accurate descriptions and figures of the fossil fish found there up to the last date mentioned.

During the summer of 1877 I made a geological excursion, in company with one of my students, to the western part of our State, to examine the junction of the Upper Silurian (“Clinton” of the Ohio Survey) and the Cincinnati group of the Lower Silurian. Whilst thus engaged near Eaton, in Preble Co., my companion, Mr. Leven Siler, of that town, picked up and handed to me a slab bearing what appeared to be a mould of the well-known bark of the Lepidodendron, somewhat weathered. More careful examination confirmed the first impression, and convinced me that I had indisputable proof of the existence of arborescent vegetation of an earlier date than had hitherto been announced upon equally conclusive evidence.