s amid
the ramifications of the Apennines S. of Marco Polo.

TAQUET.--A conspicuous little crater on the S. border of the Mare
Serenitatis at the foot of the Haemus Mountains. A branch of the great
Serpentine ridge, which traverses the W. side of this plain and other
lesser elevations, runs towards it.

MENELAUS.--A conspicuously bright regular ring-plain, about 20 miles in
diameter, situated on the S. coast-line of the Mare Serenitatis, and
closely associated with the Haemus range. It has a brilliant central
mountain, but no visible detail on the walls. On the edge of the Mare,
S.W. of it, there is a curious square formation. The bright streak
traversing the Mare from N. to S., which is so prominently displayed in
old maps of the moon, passes through this formation.

SULPICIUS GALLUS.--Another brilliant object on the south edge of the Mare
Serenitatis, some distance E. of the last. It is a deep circular crater
about 8 miles in diameter, rising to a considerable height above the
surface. Its shadow under a low morning sun is prominently jagged. On the
E. are two bright mounds, and S. of that which is nearer the border of
the Mare, commences a cleft which, following the curvature of the coast-
line, terminates at a point in W. long. 9 deg. This object varies
considerably in width and depth. Another shorter and coarser cleft runs
S. of this across an irregularly shaped bay or inflexion in the border of
the Mare.

MANILIUS.--This, one of the most brilliant objects in the first quadrant,
is about 25 miles in diameter, with walls nearly 8000 feet above the
floor, which includes a bright central mountain. The inner slope of the
border on the E. is much terraced and contains some depressions. There is
a small isolated bright mountain 2000 feet high on the Mare Vaporum, some
distance to the E.

BESSEL.--A bright circular crater, 14 miles in diameter, on the S. half
of the Mare Serenitatis, and the largest object of its class thereon. Its
floor is depressed some 2000 feet below the surrounding surface, while
the walls, rising nearly 1600 feet above the plain, have peaks both on
the N. and S. about 200 feet higher. The shadows of these features, noted
by Schroter in 1797, and by many subsequent observers, are very
noteworthy. I have seen the shadow of a third peak about midway between
the two. One may faintly imagine the magnificent prospect of the coast-
line of the Mare with the Haemus range, which would be obtained were i