Botany and Zoology. 415 
Ocean should be found to exhibit a depression at all corresponding 
to that of the North Atlantic, it must be attributed yeep to the 
extension of this Antarctic flow; since the dept hring’s 
Strait, as well as its breadth, is so small as to ‘permit n no body of 
Arctic water to issue through "that channel.t 
The Foraminifera collected in the ‘Porcupine’ expedition pre- 
sent features “= no less interest, though their scale is so much 
aller. The 
orth ape as also that of Xanthidia, wien preserv: 
ot many absolute novelties presented pacer among 
e racic that form true calcareous shells ; chief point 
of interest being the occurrence of certain types of bach organi- 
zation at great depths, and their: attainment of a size that is only 
Formations, This in much warmer latitudes, or in the Sempre or yet older 
is esp 
toline, of which specimens of unprecedented size presented them- 
selves. The most interesting novelty was a beautiful comeoeay 
: which, when —— must have had the diameter of a 
| nee 
of collection.— Of pares aceous Foraminife ra, howev: ver, which con- 
‘types ricer 
. the Chalk, the os sof a had not heen re 2 yes “ 
them throw an important light on the re 0} gigan 
arenaceous t from <n tae green-sand, recently described 
by the spe r and Mr. H. B. Brady, an accoun t of which w 
appear in the forthcoming parte of the ‘ Philosop’ ane igen: 
+ This statement is not in 
’ temperatures chetie Mons hin ie i a oy coo Padi Gor eaealien 
of oni it; fr the these indicate a suits Polne ourscobns decided sete sie 
Atlantic. 
of oceans in Dana’s Report on 
xvi, 1853, and also his Saal of Geology. The ob- 
servations ‘ou tho animal lit life of the aes pate: Y ae oe 
