present day is exclusively 
196 Miscellanies. 
The formula indicated by the above result i is, (CNK)S 3-+-3Al1S? oe ; 
view, 
than ‘Pathabeaite * and that in gmelinite, bisilicate of alumina is a 
with tersilicate of lime and alkalies; in chabasite with bisilicat 
and in levyne with silicate of these bases, as appears from the formule : 
(CNK)S3+43Al S?+7Aq. Gmelinite. 
(CNK)S?2+3Al S?-+6Aq. Chabasite. ~ 
(CNK)S +3Al S*+5Aq. Levyne. » 
Mr. Connell continues to remark, I have much less expectation that 
“the chabasite formula will ever be found to embrace levyne, because the 
proportion 
of silica and that of alumina, actually found in the latter min- 
eral, differs in a marked manner, and in opposite directions from those 
in chabasite ; while in gmelinite, the difference is much less ae 
still excluding the chabasite formula. 
23, Prof. Owen on the Fossil Animals collected by Mr. ¢ Cassius Dar: 
win, (from the Zoology of the voyage of H. M. 8. Beagle during the 
years 1832 to 1836. Part first. Fossil Mammalia.) —“ It is remarkable 
that all the fossils collected by Mr. Darwin belong to herbivorous species 
of mammalia, generally of a large size: The greater part are referable 
to the order which Cuvier has called Edentata, and belong to that subdi- 
vision of the order (Dasypodide) which is terized by having perfect 
and sometimes complex molar teeth, and an external osseous and tessu- 
_ lated coat of mail. The megatherium i is the giant of this tribe, which at the 
tec ei — American species, the lar- 
; Gigas, Cuv;) not not ex size of a hog. -'The hiatus 
between the living species and the smeganereme is filled up by a series-of 
armadillo-like animals, indicated more or less satisfactorily by Mr. Dar- 
win’s fossils, some of which species were as large as an ox, others about 
the size of the American Tapir. The rest of the coligction belongs, 
with the exception of some small Rodents, to the extensive and h 
neous order Pachydermata; it includes the remains of a mastodon, of a 
horse, and of two large and singular aberrant forms, one of which con- 
nects the Pachydermatous with the Ruminant order; the other; wit 
which the descriptions in - ee pages commence, manifests a close 
affinity to the Rodent ord 
The first fossil animal aa by Prolessar Owen is named Toz0- 
an Platensis, which he describes as a gigantic extinct mammiferous — 
animal, referable to the order Pachydermata, but with affinities to the 
* Lond. and Edinb. Phil. pee SE 
