the main divide between the Clyde and the Havelock rivers, the two main feeders of the Rangitata. Cloudy Peak (7,870 ft.) is a fine rocky mass near the end of the spur, forming a counterpart to Mount d'Archiac (9,279 ft.), which lies just opposite, on the western side of the Havelock Valley, on a spur of the Two Thumb Range (see map). Two of the hanging valleys are in the most perfect condition; they have the characteristic U-shaped cross-section of a glacial trough with enlarged head, and enter the main stream by waterfalls (Plate 8, figs. 1, 2). A striking feature of the locality, however, is the association with these of other valleys which enter the main valley at grade, and also of cup-shaped hollows, not worthy of the name of “ cirque,” which are obviously connected genetically in some way with the action of ice. Neither of the main theories advanced by the authorities cited above accounts for their origin satisfactorily, although these explanations may be quite sufficient in other cases. The other group I refer to occurs in the Clyde and Lawrence valleys, the last-named being the most easterly of. the streams which form the Rangitata River. On the western side of the Clyde, on the flanks of Cloudy