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. Prom. Aenarium. A steep bluff situated at the northern end of a plateau, some distance E. of Arzachel, in S. lat. 18 deg., E. long. 9 deg. It rises some 2000 feet above the Mare Nubium. Euclides zeta and chi. Two mountain masses N. of this formation in S. lat. 5 deg.; zeta rises about 1700 feet above the Mare; both are evidently offshoots from the Riphaean range. Landsberg H. An isolated hill in S. lat. 4 deg., E. long. 25 deg. Nicollet C. S.E. of Nicollet, in S. lat. 22 deg., E. long. 17 deg.; is hemmed in by a mountain mass rising to more than 2000 feet above the Mare Nubium. The Stag's-Horn Mountains. At the S. end of the straight wall, or "railroad," in S. lat. 24 deg., E. long. 8 deg., a curious mountain mass rising about 2000 feet above the Mare Nubium. Lacroix delta. A mountain more than 7000 feet high, N. of Lacroix. Flamsteed E. A mountain of more than 3000 feet in S. lat. 4 deg., E. long. 51 deg. D'Alembert Mountains. A very lofty range on the E. limb, extending to S. lat. 11 deg. The Cordilleras. Close to the E. limb; they lie between S. lat. 8 deg. and S. lat. 23 deg. Rook Mountains. On the E. limb, extending from about S. lat. 18 deg. to S. lat. 35 deg. According to Schroter, they attain a height of 25,000 feet. Dorfel Mountains. On the S.E. limb between S. lat. 57 deg. and S. lat. 80 deg. Leibnitz Mountains. On the S. limb extending W. from S. lat. 80 deg. beyond the Pole on to the Fourth Quadrant. Perhaps the loftiest range on the limb. Madler's measures give more than 27,000 feet as the height of one peak, and there are several others nearly as high. FOURTH QUADRANT.