CHRISTIAN MAYER.—­A prominent rhomboidal-shaped ring-plain, 18 miles in diameter, associated on every side, except the N., with a number of irregular inconspicuous enclosures.  It has a central peak.  Madler discovered two delicate short clefts, both running from N.W. to S.E., one on the W. and the other on the E. of this formation.

W.C.  BOND.—­A great enclosed plain of rhomboidal shape on the N. of Archytas, the bright ring-plain Timaeus standing near its E. corner, and another conspicuous but much smaller enclosure with a smaller crater W. of it on the floor at the opposite angle.  The interior, which is covered with rows of hillocks, is very noteworthy at sunrise.

BARROW.—­There are few more striking or beautiful objects at sunrise than this, mainly because of the peculiar shape of its brilliant border and the remarkable shadows of the lofty peaks on its western wall.  There is a notable narrow gap in the rampart on the W., which appears to extend to the level of the floor.  The walls, especially on the S., are very irregular, and include two large deep craters and some minor depressions.  If the formation is observed when its E. wall is on the morning terminator, a fine view is obtained of the remarkable crater-row which winds round the N. side of Goldschmidt.  Barrow is about 40 miles in diameter.  According to Schmidt, there is one crater in the interior, a little S.E. of the centre.

SCORESBY.—­A much fore-shortened deep ring-plain, 36 miles in diameter, between Barrow and the limb.  It has a central mountain with two peaks, which are very difficult to detect.

CHALLIS.—­A ring-plain adjoining Scoresby on the N.E.  It is of about the same size and shape.

MAIN.—­A very similar formation, on the N. of the last, much too near the limb to be well observed.

SECOND QUADRANT

EAST LONGITUDE 0 deg.  TO 20 deg.

MURCHISON.—­A considerable ring-plain about 35 miles across on the E., where it abuts on Pallas.  It is a pear-shaped formation, bounded on the N. by a mountainous region, and gradually diminishes in width towards the S.E., on which side it is open to the plain.  The walls are of no great altitude, but, except on the N.W., are very bright.  At the S. termination of the W. wall there is an exceedingly brilliant crater, Murchison A, five miles in diameter and some 3000 feet deep; adjoining which on the N.W. is an oval depression and a curious forked projection from the border.  The only objects visible in the interior are a few low ridges on the E. side, and a number of long spurs running out from the wall on the N. towards the centre of the floor.  Murchison A is named CHLADNI by Lohrmann.