In the Catalogue, N. S. E. W. are used as abbreviations for the cardinal points. LIST OF THE MARIA, OR GREY PLAINS, TERMED "SEAS," &c. FIRST QUADRANT. Mare Tranquilitatis (nearly the whole), page 5. ,, Foecunditatis (the N. portion), 5. ,, Serenitatis, 5. ,, Crisium, 6. ,, Frigoris (a portion), 5. ,, Vaporum (nearly the whole), 6. ,, Humboldtianum, 6. ,, Smythii (a portion), 39. Lacus Mortis, 53. ,, Somniorum. Palus Somnii. ,, Nebularum (a portion), 62. ,, Putredinis, 61. Sinus Medii (a portion), 6. SECOND QUADRANT. Mare Imbrium, 5. ,, Nubium (the N. portion), 5. ,, Frigoris (a portion), 5. ,, Vaporum (a portion), 6. Oceanus Procellarum (the N. portion), 5. Palus Nebularum (a portion), 62. Sinus Iridum, 80. ,, Medii (a portion), 6. ,, Roris, 90. ,, Aestuum. THIRD QUADRANT. Mare Nubium (the greater portion), 5. ,, Humorum, 6. Oceanus Procellarum (the S. portion), 5. Sinus Medii (a small portion), 6. FOURTH QUADRANT. Mare Foecunditatis (the greater portion), 5. ,, Nectaris, 7. ,, Tranquilitatis (a small portion), 5. ,, Australe, 127. ,, Smythii (a portion), 39. Sinus Medii (a portion), 6. LIST OF SOME OF THE MOST PROMINENT MOUNTAIN RANGES, PROMONTORIES, ISOLATED MOUNTAINS, AND REMARKABLE HILLS. FIRST QUADRANT. The Alps. The western portion of the range. The Apennines. The extreme northern part of the range. The Caucasus. The Haemus. The Taurus. The North Polar Range. On the limb extending from N. lat. 81 deg. towards the E. The Humboldt Mountains. On the limb from N. lat. 72 deg. to N. lat. 53 deg. Mount Argaeus. A mountain mass rising some 8000 feet above the Mare Serenitatis in N. lat. 20 deg., W. long. 28 deg., N.W. of Dawes. Prom. Acherusia. A bright promontory at the W. extremity of the Haemus range, rising nearly 5000 feet above the Mare Serenitatis. N. lat. 17 deg., W. long. 22 deg. Cape Agarum. The N. end of a projecting headland on the S.W. side of the Mare Crisium, in N. lat. 14 deg., W. long. 66 deg., rising nearly 11,000 feet above the Mare. Le Monnier A. An isolated mountain more than 3000 feet high, standing about midway between the extremities of the bay: probably a relic of a once complete ring. Secchi. South of this formation there is a lofty prominent isolated mountain. Manilius A and beta. Two conspicuous mountains N. of Manilius; A, the more westerly, being more than 5000 feet, and beta about 2000 feet in height. Autolycus A. A mountain of considerable altitude, S. of this formation. Mont Blanc. Principal peak, N. lat. 46 deg., W. long. 0 deg. 30 min., nearly 12,000 feet in height. Cassini epsilon and delta. Two adjoining mountain masses N. of Cassini, more than 5000 feet high. Eudoxus. S.E. of this formation, in N. lat. 43 deg., W. long. 10 deg., are two bright mountain masses, the more southerly rising 7000, and the other 4000 feet above the surface.