BUSCHING.—­A ring-plain S. of Zagut, about 36 miles in diameter, with a moderately high but irregular wall.  There are several craterlets within and some low hills.

BUCH.—­Adjoins Busching on the S.E.  It is about 31 miles in diameter, and has a less broken barrier.  There is a large crater on the E. wall, and another smaller one on the S.W.  Schmidt shows nothing on the floor, but Neison noted two minute crater-cones.

MAUROLYCUS.—­This unquestionably ranks as one of the grandest walled-plains on the moon’s visible surface, and when viewed under a low sun presents a spectacle which is not easily effaced from the mind.  Like so many of the great enclosures in the fourth quadrant, it impresses one with the notion that we have here the result of the crowding together of a number of large rings which, when they were in a semi-fluid or viscous condition, mutually deformed each other.  It extends fully 150 miles from E. to W., and more from N. to S.; so it may be taken to include an area on the lunar globe which is, roughly speaking, equal to half the superficies of Ireland.  This vast space, bounded by one of the loftiest, most massive, and prominently-terraced ramparts, includes ring-plains, craters, crater-rows, and valleys,—­in short, almost every type of lunar formation.  It towers on the E. to a height of nearly 14,000 feet above the interior, and on the W., according to Schmidt, to a still greater altitude.  A fine rill-valley curves round the outer slope of the W. wall, just below its crest, which is an easy object in a 8 1/2 inch reflector when the opposite border is on the morning terminator, and could doubtless be seen in a smaller instrument; and there is an especially brilliant crater on the S. border, which is not visible till a somewhat later stage of sunrise.  The central mountain is of great altitude, its loftiest peaks standing out amid the shadow long before a ray of sunlight has reached the lower slopes of the walls.  It is associated with a number of smaller elevations.  I have seen three considerable craters and several smaller ones in the interior.

BAROCIUS.—­A massive formation, about 50 miles in diameter, on the S.W. side of Maurolycus, whose border it overlaps and considerably deforms.  Its wall rises on the E. to a height of 12,000 feet above the floor, and is broken on the N.W. by two great ring-plains.  On the inner slope of the S.E. border is a curious oblong enclosure.  There is nothing remarkable in the interior.  On the dusky grey plain W. of Maurolycus and Barocius there is a number of little formations, many of them being of a very abnormal shape, which are well worthy of examination.  I have seen two short unrecorded clefts in connection with these objects.