104. = L. Lesquereux on fossil plants from Nebraska. 
Considering that we know scarcely anything of the Cretae 9 
ous flora of other countries, this number, though small, isi 7 
deed a valuable contribution to science. The scarcity of (ie F 
taceous remains of plants explains perhaps the great numb 7 
of species established from the Nebraska specimens. a i 
Phyllites, Prof. Heer remarks that between the Cretaceols | 
plants of Nebraska and those of Europe, there are no identical 
species. The celebrated paleeontologist sent to Dr. Debey of 
Aix la Chapelle, who has there discovered quite a Cretaceot 
flora, the drawings of the species collected by Messrs. Mareot 
and Capellini, inquiring about their relation to what had bea 
discovered in Belgium, The answer was, that none of the 
species were identical; that even the genera were di 
course we can not conclude from this that there is not aly 
existing relation between the Cretaceous flora of our cont 
and that of Europe, because the materials which may serve ® 
rescent vegetation, we can but recognize it in the Cretaceou* 
Liquidambar, Populus, Betula, F 
redneria acres allied to Coccoloba of which we have ™ 
species in Florida), Laurus, Sassafras, Lyriodendron, M agnolia, 
Juglans, Prunus, &c., all genera o 
tablished from leaves or mere fragments of leaves. But as paleontologists have 
Soiesene it is necessary to aes and figured, to compare them and use them for 
them as species. to them specific names and therefore to 
