ε A circular ring-plain, 42 miles in diameter.] ζ The interior of this crater exhibits some interesting features as the Sun rises higher above it. 7 Ptolemæus, Albategnius, Manilius[17], Hyginus and its rill-system, Hipparchus, Autolycus, Aristillus, Cassini, Alpine Valley, W. C. Bond, Walter, Miller, LaCaille, Apennines, Triesnecker and the rills W. of it. 8 Mare Frigoris, Arzachel, Alphonsus, Alpetragius, Bode, Pallas, Archimedes, Plato, Maginus[18], Mösting[19], Thebit, Saussure, Moretus, Straight Wall, Lalande, Kirch. 9 Tycho, Clavius, Eratosthenes[20], Stadius and the craters running to N.E., Timocharis, Pitatus, Gruemberger, Teneriffe Mountains, Straight Range[21], Formation W. of Fontenelle[22], Gambart. 10 Sinus Iridum, Copernicus, Hesiodus and the rill to E., Wilhelm I., Longomontanus[23], Heinsius, Pytheas, Lambert, Helicon, Wurzelbauer. 11 Bullialdus, Campanus, Mercator, Reinhold, Riphæan Mountains, Hippalus, Capuanus, Blancanus, Tobias Mayer. 12 Mare Imbrium, Gassendi[24], Aristarchus and sinuous valley to the N.E., Herodotus, Marius, Flamsteed, Letronne, Schiller, Mersenius, Doppelmayer. 13 Schickhard, Wargentin, Grimaldi, Byrgius, Phocylides, Hevelius, Seleucus, Crüger, Briggs, Segner, Sirsalis. 14 Mare Smythii, Bailly, Inghirami, Bouvard, Riccioli, Olbers, Hercynian Mountains, Cardanus, Krafft, Cordilleras[25], Pythagoras[26].