DANIELL.—­A bright little ring-plain N. of Posidonius.  It is connected with a smaller ring-plain on the N.W. wall of the latter by a low ridge.

BOND, G.P.—­A small bright ring-plain 12 miles in diameter, W. of Posidonius.  Neison shows a crater both on the N. and S. rim.  Schmidt omits these.

MAURY.—­A bright deep little ring-plain, about 12 miles in diameter, on the W. border of the Lacus Somniorum.  It is the centre of four prominent hill ranges.

GROVE.—­A bright deep ring-plain, 15 miles in diameter, in the Lacus Somniorum, with a border rising 7000 feet above a greatly depressed floor, which includes a prominent mountain.

MASON.—­The more westerly of two remarkable ring-plains, situated in the highlands on the S. side of the Lacus Mortis.  It is 14 miles in diameter, has a distinct crater on its S. wall, and, according to Schmidt, a crater on the E. side of the floor.

PLANA.—­A formation 23 miles in diameter, closely associated with the last.  Neison states that the floor is convex and higher than the surrounding region.  It has a triangular-shaped central mountain, a crater, and at least three other depressions on the S.W. wall where it joins Mason.

BURG.—­A noteworthy formation, 28 miles in diameter, on the Mare, N. of Plana.  The floor is concave, and includes a very large bright mountain, which occupies a great portion of it.  The interior slopes are prominently terraced, and there are several spurs associated with the glacis on the S. and N.E.  A distinct cleft runs from the N. side of the formation to the S.E. border of the Lacus Somniorum, which is crossed by another winding cleft running from a crater E. of Plana towards the N.E.

BAILY.—­A small ring-plain, N. of Burg, flanked by mountains, with a large bright crater on the W. The group of mountains standing about midway between it and Burg are very noteworthy.

GARTNER.—­A very large walled-plain with a low incomplete border on the E., but defined on the W. by a lofty wall.  Schmidt shows a curved crater-row on the W. side of the floor.

DEMOCRITUS.—­A deep regular ring-plain, about 25 miles in diameter, with a bright central mountain and lofty terraced walls.

ARNOLD.—­A great enclosure, bounded, like so many other formations hereabouts, by straight parallel walls.  There is a somewhat smaller walled-plain adjoining it on the W.

MOIGNO.—­A ring-plain with a dark floor, adjoining the last on the N.E.  There is a conspicuous little crater in the interior.

EUCTEMON.—­This object is so close to the limb that very little can be made of its details under the most favourable conditions.  According to Neison, there is a peak on the N. wall 11,000 feet in height.

METON.—­A peculiarly-shaped walled-plain of great size, exhibiting considerable parallelism.  The floor is seen to be very rugged under oblique illumination.

WEST LONGITUDE 20 deg.  TO 0 deg.