Botany and Zoology. 221 
Cb.0; Ta.0, Sn0, UO; Fe,0;(Mn20s3) Ce,03* Y¥.0; ErO Sid, 
41°07 14°36 0°16 10°90 14°61 2°37 6°10 10°80 0°56 
* With a little Di. =100°93 
The formula deduced from the above is 8R,Nb,0,, +F#,U,0,, 
where R=Y,, Fe,, Ce,(Er,), each double atom having an equiv- 
alence of six (Y= 92, Ce=138). The American samarskite differs 
from the Uralian mineral in the high percentage of tantalic acid, 
Phys i 
and of the element erbium.—Ann. Phys. u. Chem., II, ii, 663. 
Ill Borany AnD ZooLoey. 
1. Supplementary Note to the Review of Darwin’s “ Forms of 
Flowers,” (In No, 7~-71.)—A contributor to the 
i anced the i 
d) bodil 
the closed flowers, and would therefore cross-fertilize them: 2, 
that there was a neat adaptation for ulterior self-fertilization ; the 
n 
iverged, and became revolute, a ee of the : 
i e abundant pollen; es this 
Th 
may call for a brief remark. He states that Gen 
in his neighborhood behaves differently, and that the flowers 
“do not last a long while.” Between this an 
y is not v ‘ t 
done away with by the statement following, that “ the ovarium, 
d soon pushes itself through the 
mouth of the corolla, exposing the stigmatic surfaces which remain 
” - * 
cross-fertilized before this, its day is long passed. __ 
ollows this: “The only difficulty with me 1s, that I do 
hot see where the pollen to cross-fertilize is to come from, Mr. 
i from 
lon.” This is equivalent to saying that there is no “ practical” 
(meaning useful) cross-fertilization if the plants grow near enough 
for a bee to fly from the one to the other; which is making what 
iT9 
