he E., running from the wall to the
E. side of Janssen, is a straight narrow valley. Both Fabricius and
Janssen should be viewed under a low morning sun.

STEINHEIL.--A double ring-plain, W. of Janssen, 27 miles in diameter. The
more easterly formation sinks to a depth of nearly 12,000 feet below the
summit of the border.

METIUS.--This ring-plain, of about the same size as Fabricius, but with a
still loftier barrier, abuts on the N. wall of this formation, and has
caused a very obvious deformation in its contour. It is prominently
terraced internally, and on the W. the wall rises at one peak to a height
of 13,000 feet above the floor, which contains a deep crater on the W. of
the centre, and many ridges.

BIELA.--A considerable ring-plain, about 55 miles in diameter, S.W. of
Janssen, with a wall broken on the N.W., S., and E. by rings and large
enclosures. There is a central mountain, but apparently no other details
on the floor.

ROSENBERGER.--This formation, about 50 miles in diameter, is one of the
remarkable group of large rings to which Vlacq, Hommel, Pitiscus, &c.,
belong. Its walls, though of only moderate altitude, are distinctly
terraced. In addition to a prominent central mountain (E. of which
Schmidt shows two craters), there is a large crater on the S. side of the
floor, and many smaller craters and crater-pits.

HAGECIUS.--The most westerly member of the Vlacq group of formations. It
is situated on the S.W. of Rosenberger, and is about 50 miles in
diameter. The rampart on the E. is continuous and of the normal type, but
on the opposite side is broken by a number of smaller rings.

WEST LONGITUDE 40 deg. TO 20 deg.

CENSORINUS.--A brilliant little crater, with very bright surroundings, in
the Mare Tranquilitatis, nearly on the moon's equator, in W. long. 32
deg. 22 min. Another smaller but less conspicuous crater adjoins it on
the W. On the Mare to the S. extends a delicate cleft which trends
towards the Sabine and Ritter rill system.

CAPELLA.--Forms with Isodorus, its companion on the E. (which it
partially overlaps), a very noteworthy object. It is about 30 miles in
diameter, with finely terraced walls, broken on the S.W. by broad
intrusive rill-valleys. The rampart on the N.E. is also cut through by a
magnificent valley, which extends for many miles beyond the limits of the
formation. There is a fine central mountain, on which M. Gaudibert
discovered a crater, the existence of which has be