North Island: Forming cushion with B. convexa on dead Leucobryum cushion, Mangawaru plateau, 3,400ft., Raukumaras, 9,320, A. P. D., 1953. Stewart Island: Epiphytic on tree-ferns, Port Pegasus, 623 and 610 (probably the same gathering); on forest trees with Radula sp., West Hut, Tin Range, 593, with Acromastigum anisostomum on log in forest, 345, W. M. The Handbook also records it from Stewart Island. Also found in Australia and Tasmania, the type being from Nova Hollandia (Australia) in Herb. Hooker, leg. Cunningham. Bazzania hochstetteri (Reichardt) comb. nov. Text-fig. 1, fig. 1. Mastigobryum affine Mitt., Fl. Nov. Zel., ii, 147, 1854; Handb. N.Z. Fl., ii, 525, 1867. Mastigobryum Hochstetteri Reich., Diagonses der neren Art. ion Lebermoosen welchen die Nov. Exped. mitbrachte 1868; Steph. Spec. Hep., iii, 533. 1909. Mast. quadratum Col., Trans. N. Z. Inst., 18, 246, 1885. Mast. polyodon Col., ibid. 19, 291, 1886. Mast. pusillum Col., ibid., 19, 290, 1886. Mast. heterophyllum Col., ibid, 19, 291, 1886. Mast, Kirkiana Steph., Spec. Hep., iii, 455, 1909. Bazzania quadratum (Col.) Hodg., Trans. Roy. Soc. N.Z., 78, 499, 1950. Plants small, in loose mats, yellow to dull green, variable. Stems procumbent ca. 2 cm., rarely more, branches often short and divaricating, both stem and branches often partly bare of leaves, flagella fairly short and numerous. Leaves contiguous to imbricate, rarely deflexed, usually fugacious, 0·7–1 mm. long by 0·3–0·4 mm. wide at the widest part, variable in shape, subvittate, narrow-oblong or oblong-falcate to ovate-oblong, dorsal bases not contiguous, ventral margin fairly straight, apices very variable, mostly 0·2 mm. wide, rarely more than 0·3 mm., tridentate with bidentate leaves often present, teeth conspicuous, truncate or obliquely truncate. Cells mainly rounded-quadrate, uniformly large between 30 and 40μ, or dorsal marginal ca. 20μ., increasing to 45μ, in an irregularly shaped and variously placed area, walls thin, trigones small to medium, cuticle minutely papillose. Stipules variable, slightly connate with the leaves or free, at least twice as wide as the stem almost entire to crenate-toothed, hyaline cells to 30μ, reaching to varying depths. This species is recognized by its small size, narrow leaves, and stems partly bare of leaves. It differs from B. adnexa forma submutica in its usually shorter stems and branches, leaves longer and narrower with variable apices, sometimes bidentate, and in the variable apices of the stipules. Mitten's name of Mastigobryum affine 1855 is unfortunately invalid, as the same specific name was bestowed on a Mexican plant by Lindenberg and Gottsche in 1847. I think that Stephani was incorrect in reducing M. affine Mitt. to M. adnexa, specialty as M. Kirkiana St., is the same species. Both M. affine Mitt., and M. Kirkiana St. from the Gt. Barrier, have some leaves with an obliquely truncate apex, as in Stephani's drawing of M. Kirkiana, the reason possibly being that the third tooth is tending to disappear. Bidentate leaves are quite common on stems of M. Kirkiana, though Stephani apparently did not notice them. Mitten's type of M. affine has stems and branches bare of leaves, and the leaves have uniformly large (comparatively) cells. Stephani places B. Hochstetteri in his Section Vittatae, but it is not constantly or uniformly vittate as are B. monilinerve, B. convexa and B. Tayloriana.