Pytheas beta. An isolated mountain, 900 feet high, in N. lat. 20 deg., E. long. 23 deg.
Kirch. There is a small isolated hill a few miles N. of this formation.
Kirch GAMMA. A bright mountain about 700 feet high, in N. lat. 39 deg.,
E. long. 3 deg.
Piazzi Smyth beta. A small bright isolated mountain on a ridge S. of this, is a noteworthy object under a low sun.
Lambert GAMMA. In N. lat. 26 deg., E. long. 18 deg.; a remarkable curved mountain about 3000 feet in height, a brilliant object under a low sun.
D'Alembert Mountains. A range on the E. limb running S. from N. lat. 12 deg.
Wollaston. An isolated triangular mountain about midway between this and
Wollaston B.
THIRD QUADRANT.
The Riphaean Mountains. An isolated range S. of Landsberg in S. lat. 7 deg., E. long. 28 deg. They run in a meridional direction, and rise at one peak to nearly 3000 feet above the Oceanus Procellarum.
The Percy Mountains extend from the eastern flank of Gassendi towards Mersenius, forming the north-eastern border of the Mare Humorum.