Epidote-chlorite-actinolite-schists. The sole example studied from subzone Chl. 3 is a pale applegreen, rather foliated rock (4749) from Locality 22. It consists chiefly of actinolite in ragged prisms (0.2–0.05 mm.) mostly trending in a general direction, though frequently oblique thereto, set in a matrix of more finely fibrous actinolite, very pale almost isotropic prochlorite and minutely granular epidote. A comparable rock (1907), differing from the latter in the scarcity of actinolite and presence of irregular streaks of quartz-albite mosaic (grain-size 0.03 mm.), was obtained in the Red Pyke Valley, and was derived probably from the northern extension of the Bryneira Range. Sub-zone Chl. 4. The bulk of the schists examined may be included in this group, and include rocks with mineral assemblages and structures similar to the above, but differing from them in their greater grain-size and more marked foliation, together with others possessing different mineral-assemblages and structures. In general the grain-size increases towards the eastern margin of our area, where also occur rocks with the most distinctive structures. Characteristic Mineral Assemblages and Rock Types. Quartz-albite-chlorite-sericite-(haematite)-schists. These are represented by rocks from Localities 12 (4740), 16 (4741), 32 (4844), 33 (4858), 34 (4851), 35 (4855), 37 (4852), 38 (4857), 39 (4863), 41 (4859), 43 (1304, 1305, 1467), and a rock (4864) from the summit of Mount Stargazer two miles north of Mount Aspiring. The foliation is expressed chiefly by the occurrence of layers of sericite with or without finely divided haematite or graphite alternating layers of quartz and albite. The chlorite, a prochlorite, may be in either association. Accessory epidote and rarely apatite and calcite are occasionally present. The original lamination, best shown by the opaque material, has been torn into lenticles and greatly contorted into open or close-packed isoclinal folds, broken or dragged out by shearing. Ribbons of quartz and albite running more or less parallel to the axial planes of the corrugations meet their limbs obliquely (4741, 4844, 4851, 4852), but may occur parallel to the sheared-out laminae (4857, 4858, 4863), or follow conformably the corrugations, or showing intersecting directions (4855), the result possibly of repeated shearing during folding. In some cases the effect results from the growth of elongated quartz grains across tensional fractures which lie oblique to the general schistosity (4851). The rock (4859) from the Shotover Saddle contains fairly well developed crystals of sphene and of pyrites in addition to the above-mentioned minerals. Perpendicularly to one or more (but rarely to all) of the sides of the latter, ribbon-like quartz grains may extend 0.2–0.6 mm. out into the general matrix in which there are indications of two directions of shearing. The rock (4864) from Mount Stargazer, beyond the north-eastern corner of our map, is characterised by the strongly marked development of albite into equant porphyroblasts 0.5–1.0 mm. in diameter, with straight lines of inclusions in varying