ite
inadequate to account for it, we may ask, what has become of the material
which presumably once filled this vast depression? Harpalus has a bright
central mountain.

SOUTH.--On the W. and S., the boundaries of this extensive enclosure are
merely indicated by ridges, which nowhere attain the dignity of a wall.
On the N., the edge of a tableland intersected by a number of valleys
define its limits, and on the E. a border forming also the W. side of
Babbage. The interior is traversed by a number of longitudinal hills, and
includes two bright little heights, drawn by Schmidt as craters.

BABBAGE.--A still larger enclosed area, adjoining South on the E., and
containing a considerable ring-plain near its W. border. It is a fine
telescopic object at sunrise, the interior being crossed by a number of
transverse markings representing ridges. These are very similar in
character (but much coarser) to those found on the floor of J.F.W.
Herschel. The curious detail on the E. wall is also worth examination at
this phase.

ROBINSON.--A bright and very deep little ring-plain, about 12 miles in
diameter, on a plateau N. of South. Schmidt shows a crater on the W.
border, and two others at the foot of the N. and E. borders respectively.

ANAXIMANDER.--A fine but much foreshortened ring-plain, 39 miles in
diameter, abutting on the E. side of J.F.W. Herschel. It has a large
crater on its W. border, which is common to the two formations, and a
very prominent crater, both on the S. and N. The barrier on the S.W.
rises to a height of nearly 10,000 feet. Schmidt shows a crater and other
details on the floor.

EAST LONGITUDE 60 deg. TO 90 deg.

LOHRMANN.--This ring-plain, with Hevel and Cavalerius on the N. of it, is
a member of a linear group, which, but for its propinquity to the limb,
would be one of the most imposing on the moon's surface. Lohrmann, about
28 miles in diameter, is surrounded by a bright wall, which, to all
appearance, is devoid of detail. Two prominent ridges, with a fine
intervening valley, connect it with the N. end of Grimaldi. It has a
large but not conspicuous central mountain. On the rugged surface,
between the ring-plain and the E. edge of the Oceanus Procellarum, lies a
very interesting group of crossed clefts, some of which run from N.E. to
S.W., and others from N.W. to S.E. Three of the latter proceed from
different points in a coarse valley extending from W. to E., and cross
the ridges just mentione