therefore we retain this name for a genus which certainly claims to be separated as well from LesJcia as from Hookeria.
1. Hypopterygium laricinum, Bridel; Bryol. Univ. v. 2. p. 714. Hypnum laricinum, Hook. Musc. Exot. t. 35. Hypnum tamariscinum, Swartz!
Hab. Herrnite Island; in wet places on the ground, very common in the woods, forming large green patches (always barren).
Under Leskia tamariscina two species have been confounded by Hedwig (Sp. Muse. p. 212). The name ought to be applied to the present moss, if the inconvenience of changing names generally received did not forbid.
2. Hypopterygium Thouini, Schwaegr.; Suppl. t. 289 (sub nom. Hypnum). Hypnum Arbuscula, P. Beauv. Ætheog. p. 61! Hypopterygium Thouiui, Montague in Ann. Sc. Nat., Aug. 1845, p. 86.
Hab. Strait of Magalhaens; Port Famine, Capt. King.
Our specimens are not so large as those described by P. de Beauvois, though evidently belonging to the same species. Dr. Montague has properly remarked that this species differs from H. laricinum in the flabelliform, not pinnate, disposition of its branches, which all spring from one central point and take a horizontal direction. Fertile specimens from Colchagua, in Chili, have also a more pendulous oblong capsule and shorter operculum.
Ord. LIII. HEPATICÆ, Juss.
(By Dr. Thomas Taylor and J. D. Hooker.)
1. JUNGERMANNIA, L.
(1. Gymnomitrion, Nees.)
1. Jungermannia physocaula, Hook. fil. et Tayl.; caule gracili disperso suberecto ramoso celluloso-tumente, ramis apice curvatis incrassatis, foliis laxe cellulosis imbricatis distichis concavis oblique erectis late ovatis quadrato-rotundatisve ad medium bifidis segmentis late subulatis integerrimis. Nobis in Lond. Journ. Bot. v. 3. p. 455. (Tab. CLVI. Fig. I.)
Hab. Herrnite Island, Cape Horn; creeping through tufts of J. densifolia, Hook.
Caules 1-2 unc. longi, graciles, vage parce ramosi; rami solitarii v. bi-terni, pallide olivacei v. albidi, nunc rufo-brunnei, apice curvati. Folia tumida, arcte imbricata, cauli appressa; segmentis formæ subvariis, integerrimis. Stipulæ nullæ.
Allied to the Scottish J. concinnata, Lightf.; but readily distinguishable by the stems not being tufted, the shoots slender and flexile, the larger more cellular leaves, which are far more deeply divided, and have lanceolate segments, and by the cellular stem.
Plate CLVI. Fig. I. — 1, plant of the natural size; 2, portion of stem: 3, leaf: — magnified.
2. Jungermannia atrocopilla, Hook. fil. et Tayl.; caule tenuissimo procumbente implexo parce ramoso flexuoso basi louge nudo, foliis remotis erectis cauli appressis concavis late ovato-quadratis integris eroso-
