le ee 
. 
Geology. 437 
? Comptonites, Salicites, Populus, Alnites, Acer? and Quercites, 
M. a however, says, (p. 50), that most of these vegetable remains 
need further examination, which was not possible, until more perfect 
ciently determined genera: viz. Comptonites, Salicites, Populus and Al- 
nites. Mr. Stichler, therefore, does not enter into those at all, although 
his work treats on the very flora of this locality, and ae evidently 
ignoring them. I confess freely, that in my opinion it is not possible 
to build such important conclusions on such uncertain data, and that 
it were better to lay them aside until a somewhat more correct solution 
is possible. But it, for argument’s sake, we should accept these defi- 
thereby bettered, as that list contains only two of the genera mentioned 
by him, Populus and Acer, and this last one, Stichler himself ———. 
immediately afterwards as eee ites? That Acerites is not t 
ar Alnites not Alnus, and Salicites not Salix, it is surely sag cessary 
ue any further at present. They designate only similar Gute of 
site which, however, are so incompletely preserved, that a stricter defi- 
nition ‘oni not be formed, as Mr. Stichler himself shows, that Salicites fra- 
giliformis is not a proper Salix, but is better to be designated as Phyllites. 
It is true, Messrs. Geeppert, Reuss and Dunker mention saliciform Jeaves 
are the veins sufficiently preserved to enable us to recognize in them the 
characteristics of the Salix: the definitions, therefore, have to remain yet 
unsettled. * 
Vorw elt, S 8), accor o him Salicites angustus uss belongs to 
Caevilics Comptoni stig. jose Nils., however, to Dryandra. ‘Thus 
stands the matter in relation to those genera, which, according to Dr. 
enera ment fs has ‘himeelt ae in favor of the Tertiary 
ora and not of the Cretaobo, and re Lees java his assertion, that 
the Flora of Nebraska is closely alli e Cretaceous of Europe, is 
not supported by the evidence. It is a incomprehensible to me, 
Salicites Hartigi Dunk., cannot belong to Salix: not only are the 
babsti rei different, but also the terminations of the ve 
tng Ue inate, 
arches, not margin, while in these Salic at least in the 
drawing), they them Salicites Potzeldianus Geep.,(Nov. Act. Acad. Leep 
xix, t. 47; fig. 18), Mr. Geeppert himself considers as very i ies 
occur ies those shortened lateral veins characteristic of the willows. Carpinites 
arenaceus Gp., (1. ¢. Taf. 47, ae te 19, 20) cannot be compared with Carpinus; the 
secondary veins terminate in 
