424 Scientific Intelligence. 
ter: and if the earth has on the contrary cooled from a state of fusion 
downward from the surface, a cooling crust commencing the operation, 
there are no possible conditions under which a simple crystal could be 
formed out of the whole globe, while a moving molten interior existed. 
The crystallization would go on variously in different parts of the outer 
surface, according to the nature of the ingredient which might be 
cooling. Great structural lines, or cleavage directions might be formed, 
and these would coincide with the lines of equal tension in the cooling 
crust, which again would depend on the ees lines of the epoch, 
these being coincident: mainly with the magnetic isodynamic lines. 
But the structural ee thus produced, Saini have in its nature 
little similarity to the great octahedron of Hauslab, although there 
might bea snlterien in Some of the great lines of fracture and the ele- 
vations that have ee ote aged ergata 
IH. Botany anp Zoorocy. 
press and fifty plates. As Carex is a favorite genus with our botanists, 
we indicate, as we have formerly ane 8 the species illustrated in the 
present fasciculus, which belong to the American Flora. ‘These 
are, Carex exilis of Dewey, fizured from ena specimens given-in the 
- part of Dr. Sartwell’s excellent Carices Amer. Sept. Exsiccale. 
d imens 
gathere by Engelmann and Fendler. C. cristata of Schweinitz, 
from Geyer’s Illinois and Sartwell’s specimens. The form figured has 
a more slender and lax spike than the typical ati and is still less dis- 
tinguishable from C, Pena sae C. festiva of Dewey, figured 
from Swedish specimens in the Herb. Normale of Fries, part 7, num- 
ber 82, aud from Labrador specimens. C. aurea of Nutiall, admirably 
figured from Dr. Sartwell’s, 65. C. Geyeri of Boott, from Geyer’ 
regon collection, No. 332. C. Rugeliana of Kunze, ‘and C. juncea 
of Willdenow (C. miser, Buckley, C. “Rugeliana, Kunze in herb. Hook. 
in part.) Also, probably, = levirosiris of Fries sheets, from Herb. 
Normale, part 6, No. 47) is to be enumerated as North Americap, 88 
C. utriculata, Boot, is ee as a synonym, Bifes oe with a mark of 
doubt. Some corrections are given at the close, most of et i 
gha been indicated in this Journal. 
2. Pritzel: Thesaurus Literature Botanice omnium cosilen inde 
a rerum s Doanical initiis ad nostra usque lempora, quindecim mil- 
lia operum recensens. Leipsic. Brockhaus, 1851. pp: 547, 410.— —A 
very elaborate and faithful work, which has been.several years iD 
course of publication, but which was finished pay at the close of the 
last year. The letter-press is in’ double columns of small! types of 
which 350 pages are occupied by the titles of botanical books, or me- 
moirs which have been separately issued; the remainder is occupi¢ 
