GRUEMBERGER.—­A much larger and more irregular ring-plain, nearly 40 miles from wall to wall, on the E. side of Cysatus.  Its W. border rises nearly 14,000 feet above the interior, which includes an abnormally deep crater, the bottom of which is 20,000 feet below the crest of the W. wall, and several small depressions and ridges.  The inner E. slope is finely terraced.

MORETUS.—­A magnificent object, 78 miles in diameter, but foreshortened into a flat ellipse.  Its beautifully terraced walls and magnificent central mountain, nearly 7000 feet high, are very conspicuous under suitable conditions.  The rampart on the E. is more than 15,000 feet above the floor, while on the opposite side it is about 5000 feet lower.

SHORT.—­A fine but foreshortened ring-plain of oblong shape, squeezed in between Moretus and Newton.  It is about 30 miles in diameter, and on the S.E., where its border and that of Newton are in common, it rises nearly 17,000 feet above the interior, which includes, according to Neison, a small central hill.  Schmidt shows a crater on the N. side of the floor.

NEWTON.—­Is situated on the S.E. side of Short, and is the deepest walled-plain on the visible surface.  It is of irregular form and about 143 miles in extreme length.  One gigantic peak on the E. rises to nearly 24,000 feet above the floor, the greater part of which is always immersed in shadow, so that neither the earth or sun can at any time be seen from it.

MALAPERT.—­A ring-plain situated far too near the limb for useful observation.  Between it and Newton is a number of abnormally shaped enclosures.

CABEUS.—­Another object out of the range of satisfactory scrutiny.  Madler considered that it is as deep as Newton.  According to Neison, a central peak and two craters can be seen within under favourable conditions.  Schmidt draws a long row of great depressions on the N. side of it.

EAST LONGITUDE 20 deg.  TO 40 deg.

LANDSBERG.—­A ring-plain, about 28 miles in diameter, situated in Mare Nubium, S.E. of Reinhold, which in many respects it resembles.  Its regular massive border is everywhere continuous.  Only a solitary crater breaks the uniformity of its crest, that rises on the W. to nearly 10,000 feet, and on the E. to about 7000 feet above the floor, which is depressed about 7000 feet below the surrounding surface.  The inner slopes exhibit some fine terraces, and on the broad W. glacis is a curious winding valley, which runs up the slope from the S.W. side to the crater just mentioned, then, bending downwards, joins the plain at the foot of the N. wall.  Neither this nor the crater is shown in the maps.  The large compound central peak is apparently the sole object in the interior.  At 8 h. 25 m. on January 23, 1888, when observing the progress of sunrise on this formation with a 8 1/2 inch Calver-reflector charged with different eyepieces, I noticed, when about three-fourths of the floor was in shadow, that the illuminated portion