200 M. Brongniart on the different Floras which 



Doubtful Monocotyledons. 



Palissya? patens, Brong. — Hoer. 



Lycopodites patens, Brong.) 

 Taxites podocarpoides, Brong. — 



Stonesfield. 

 Pence Lindleyana, With. — Whitby. 



eggensis, With. — Hebrides. 



jurassica, Endl. — Poland. 



Podocarya , Buckl. — Char- 

 month, Dorset. 



Carpolithes conica, L. Sf H. — Mal- 

 ton. 



Bucklandii, L. Sf H. — Malton. 



This list is chiefly based upon the very varied fossils collected 

 on the coast of Yorkshire, near Whitby and Scarborough^ in beds 

 which are referable to different parts of the inferior oolite, and in 

 particular to the great oolite. It also contains a small number 

 of species found in the schistose limestone of Stonesfield, near 

 Oxford, belonging to the same strata. 



In Fi-ance, the fossils of this formation have been collected 

 chiefly in the neighbourhood of Morestel, near Lyons, by Dr. 

 Lortet ; at Orbagnoux and Abergemens near Nautua, in the de- 

 partment of Ain, by M. Itier ; in the vicinity of Chateauroux, 

 near Chatillon-sur- Seine, by Colonel Moret ; at Mamers, depart- 

 ment of the Sarthe, by M. Desnoyers ; and lastly, in great quan- 

 tity, by M. Moreau, in the beds of the very pure white oolitic 

 limestone in the environs of Verdun and near Vaucouleurs. Some 

 species have also been found at other points of the Jura, in Nor- 

 mandy, near Valognc, in the environs of Alen9on, but in very 

 smair numbers in each of these localities. The majority of these 

 species remain still without descriptions and figures, and they 

 mostly differ, specifically, from those of England. The Ferns are 

 usually less numerous and not so well preserved ; an exception 

 however must be made in the case of Hymenophyllites macro- 

 phyllus, found in a perfect condition at Morestel, and observed 

 also at Stonesfield and in Germany. The Cycadacese, the spe- 

 cies of which are not very varied, are referable to the genera 

 Otozamites and Zamites ; Ctenis, Pterophyllum and Nilsonia have 

 not yet been observed there ; finally, the Coniferse of the genus 

 Brachyphijllum are especially abundant there, and more frequent 

 than in the other localities. 



In Germany, these fossils have been principally observed in 

 the schistoid limestone of Solenhofen, near Aichstadt, particu- 

 larly those of the Algse ; M. Goppert also announces several Cy- 

 cadacese in the Jurassic formation of Ludwigsdorf, near Kreuz- 

 berg, in Silesia. 



But these very different localities belong to very different 

 stages of the oolitic series, and will perhaps, when they are 

 better known and more completely explored, constitute distinct 

 epochs. 



The distinctive characters of this epoch, comprehended in the 

 whole extent that we have assigned to it, from the lias up to the 



