612 General Notes. [ August, 
‘the artificer was the Dryofithecus, because the horizon of the 
flints is not exactly that in which the remains of that large ape 
occur. He proposes the hypothesis that the problematical being 
was the form which has intervened between the higher apes and- 
man. Thus far M. Mortillet’s positions appear to be reasonable, 
provided that his flints are artificial. 
M. Mortillet goes further. He names the genus to which this 
being is to be referred, and calls it Axthropopithecus. As he has 
not the shadow of a definition for the genus, its proposition is in 
violation of all rules. Had he assumed the risk of furnishing it 
with characters, its adoption would have been a matter of time 
and discovery. Moreover, the name he uses is preoccupied. He 
then proceeds to name the species, of which he enumerates three. 
His method of distinguishing these is not zodlogical ; they are 
proposed on inference as to their differential characters, which 
extends to size only. The dimensions are estimated by those of 
the flints, one species having manufactured large implements, and 
ancther small ones. It is therefore supposed that one of the spe- 
cies was of large size, and another one small. 
We think on such a basis, we could infer several species of 
Homo on the North American continent, and as zodlogists and 
palzontologists, we must decline to admit such unsubstantial 
visions within the Walhalla of species and genera. 
Icuanopons.—Miss Agnes Crane, in a recent letter, states that 
the remains of the Iguanodons recently discovered in the Weal- 
den formation at Bernissart, near Mons, on the Belgian frontier 
are now in process of articulation in the workshops of the Royal 
Museum at Brussels. M. Dupont is engaged in preparing a sec- 
ond and enlarged edition of his account of their discovery. 
Several perfect animals of various sizes were found associated 
with the “remains,” of crocodiles, gigantic tortoises (rivaling 
Miocene forms), fishes and plants. The structure of the fore and 
hind limbs, the skuli and the tail is now well known, and proves 
the animal to have been very different to all previous restorations. 
Prof. Owen is right as regards proportions of the fore limbs and 
the analogies he drew from them, Prof. Cope’s views in relation 
to the posterior extremities will receive strong confirmation, while 
as to the “ structures known respectively as the ‘horn’ and the 
‘spur,’ every one was, on the other hand, far from imagining the 
truth,” eg. 
Tue GEOLOGY AND TOPOGRAPHY OF THE CATSKILL MOUNTAINS. 
—Prof. Hall long since showed that the mass of the Catskill 
mountains (N. Y.) consists of nearly horizontal beds of Devonian 
rocks of the Chemung and Catskill epochs, which rest uncon- 
. formably on the Silurians. Prof. Guyot has recently published 
some interesting results of his observations on the region. A 
has, for the first time, determined the topography of the Southern 
