Austin, Captain, on sea-bottom.
Australia, foliated rocks of.
Azara labiata, beds of, at San Pedro.
Baculites vagina.
Bahia Blanca, elevation of. —formations near. —character of living shells of.
Bahia (Brazil), elevation near. —crystalline rocks of.
Ballard, M., on the precipitation of sulphate of soda.
Banda Oriental, tertiary formations of. —crystalline rocks of.
Barnacles above sea-level. —adhering to upraised shells.
Basalt of S. Cruz. —streams of, in the Portillo range. —in the Uspallata range.