. 
1887] Botany. 75 
COLUMBITE."—A number of new ¢rystals of this mineral from 
Standish, Maine, have been measured, and from the data thus 
obtained a recalculation of the axial ratio has been made. Ac- 
cording to the new measurements, a: b: c==.40234: I: .35798 
(Schrauf’s position) and .8285: 1: .88976 (Dana’s position). 
The species is without doubt orthorhombic. Differences in com- 
position appear to have little effect on the value of interfacial 
angles. 
DiasporeE.*—The two new planes På and P2 were discovered 
on a fine crystal of diaspore from Chester, Mass. 
SuULPHUR.'!—4}P and ¿P7 are described as new forms on sulphur 
from Rabbit Hollow, Nev. 
mong some remarkably fine crystals of hiddenite, xeno- 
time, monazite, and guartz from North Carolina, Mr. Hi 
mentions having found on the latter a well-developed basal plane 
which yielded to Professor Des Cloizeaux, OP A R= 128°, the 
calculated angle being 128° 13’. On black ‘ourmailine from 
Sharpe’s township, Alexander County, the new form was 
detected. On xenotime from the same county 3P was found, and 
on herderite from Stoneham, Maine, the new plane Ps. 
twinned crystal of molyédenite from Renfrew, Canada, suggests 
that this mineral may crystallize in the hexagonal system with its 
planes hemimorphically developed. 
BOTANY.: 
Pollen-Tubes of Lobelia.—In the AMERICAN NATURALIST, vol. 
xx. page 644, the pollen-tubes of Lodelia syphilitica were shown 
in the tissue of the style with enlarged or club-shaped tips. The 
tip. The three lower and right-hand grains are drawn as seen 
after the nucleus has taken the dye. 
* Amer. Jour. Sci., xxxii., Nov. 1886, p. 386. 
?Ib., xxxii., Sept. 1886, p. 204. 
3 Edited by Prof. CHARLES E. Bessey, Lincoln, Nebraska. : 
