276 Scientific Intelligence. 
stones forming the base of the cine es sysiem in Ireland, that it is 
impossible not to believe them to be nearly on the same parallel, = 
there is equal difficulty in raining them to be either younger or old 
than those deposits. Of those species no less than eleven are believed 
to be positively identical, on the most careful comparison of the Austra- 
lian and Irish specimens, and nine more are so closely allied that it nee 
been found impossible to detect any difference of character, but whic 
ither from imperfect preservation or want of sufficient specimens to 
display all the characters, have n sien ee identified. With 
such evidence as I have iiebtioned Id t think it improbable that a 
wide geological interval occurred Siti: the consolidation of the fos- 
siliferous beds which underlie the coal, and the deposition of the coal- 
measures themselves; that there is no real connexion between them, but 
that they belong to widely different geological systems, the former refer- 
able to the base of the carboniferous system, the latter to the oolitic, 
and neither showing the slightest tendency to a confusion of type. 
Ill. Zooroey. 
I. Ona new genus and species of Fossil Ruminantia : Poébrothe- 
rium Wilsoni; by Josepu Leipy, M.D., (Proceed. Acad. Nat. Sci., 
Philad., New; iy 1847, p- 322. )—Indirectly through Mr. J. S. Phillips and 
the influeties of Dr. 8. G. Morton, the Academy has become the depos- 
itory of a valuable and unique fossil, received through Dr. 8. D. Cul- 
berison of Chambersburg, Pa., fro nM. Joseph Culbertson 
s first received, it consisted of a mass of argillaceous limestone, 
havitig one side of a cranium of an animal exposed to view, which, 
by the patience of Dr. T. A. Wilson, was relieved of its matrix, and 
the lower extremity of the humerus, and the zee extremity of the 
ulna and radius of the right leg were also disclose 
The top or vault above the orbits, and posterior part of the cranium, 
are wanting, as are also the ossa nasi, ossa intermaxillaria, the part 0 of 
the os maxillare inferius just anterior to the commencement of the sym- 
phisis, and the zygoma of the left side, but sufficient is left to charac- 
terize it as a remarkable genus of Ruminantia, very different from any 
that has been heretofore described. 
he cranium belonged toa full grown or adult animal, but not an 
old one, as is indicated by the teet 
In the upper jaw are seven molars, differing i in this respect from any 
ruminant known, living or fossil. The posterior three molars, usually 
ealled true, present nothing very setiattacs in their conformation. They 
are not so square as in Cervus, but are more like those of Ovis, being 
much broader than wide, so that they have a compressed appearance. 
The four crescents upon the crowns are quite simple. Externally 
these teeth present two and nearly plane surfaces, separated by an ab- 
ao salient, longitudinal ridge on a line with the notch separating the 
erior and posterior pair a columns. Each of these surfaces has @ 
longi rounded ridge, more prominent upon the anterior than the 
r one, but neither so satin as the first. ‘The antero-external 
border i is also elevated or prominent, so that each of these teeth pre- 
externally ~ longitudinal ridges. As is usual, these t 
