| 41. | By driving along the side of the rille it would be hard to miss their target.
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| 42. | To the southeast is a rille named the Rima R�aumur, following a line to the northwest.
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| 43. | In the center of the walled plain is a narrow rille that runs toward the eastern rim.
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| 44. | To the west and southwest of this crater is a rille in the surface of the mare.
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| 45. | The lava-flooded floor of Hippalus is bisected by a wide rille belonging to the Rimae Hippalus.
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| 46. | Southeast of Billy is a rille, designated Rima Billy, that runs 70 kilometers to the south.
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| 47. | A sinuous rille named Rima Conon runs along the middle of this feature, reaching the northern end.
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| 48. | There is a rille system named the Rimae Arzachel that runs from the northern wall to the southeast rim.
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| 49. | V�is�l?lies just to the west of the Rupes Toscanelli fault line, and the Rimae Aristarchus rille system.
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| 50. | The surface is crossed by the rille system designated Rimae Boscovich that extends for a diameter of 40 kilometres.
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