260 ICE-MARKS AND ANCIENT GLACIERS 
come out from their concealment and meet the underside 
of the insect where pollen may be left or received. + Why 
the style should be so uniformly curved upward, and all 
should be brought against the abdomen of insects, I can- 
not well conceive, unless it be of some use to the plant. 
Lupine, another species in this family, has a remarkably 
long keel which makes a close sheath for the inside parts. 
Ont the style, just below the extremity, is a circle of long 
stiff bristles. As the keel is pushed down, only the stig- 
ma, with the bristles below, appears outside, and this 
pushes out a mass of pollen which generally hits some 
part of the insect. When left, the flower resumes its 
former position again. 
For about six times pollen can be pushed out in this 
way, when the supply becomes exhausted. Insects begin 
on the lowest flowers, and so go up the spike to others 
which are higher and younger. No experiments have 
been made on Lupine to show whether it will produce 
more seeds when visited by insects than when protected. 
a ee 
—— S 
ICE-MARKS AND ANCIENT GLACIERS IN THE 
WHITE MOUNTAINS. 
BY A. S. PACKARD, JR., M.D. 
Durme a visit last autumn to the White Mountains, 
we found ice-marks in the valleys of the Saco, Ellis, and 
_ Androscoggin Rivers. These grooves, and other signs of 
ice action, give the clearest evidence, that, during the 
- Glacial Period, the White Mountains were covered by à 
central mer-de-glace, which discharged local glaciers into 
_ the principal valleys radiating op Pier: the central peaks. 
- Like the glaciers of the Alps, of the mo mountains of” 
