Caules caespitosi, 2-3 liu. longi, ramis brevibus apice coma incrassatis. Folia deusa, e basi lineari longissime attenuate, subflexuosa, carinata, iutegerrima, virklia, nervo conspicuo sub apicem evanido, cellulis elongatis : periehsetialia longiora, similia, antheridiis in axillis eoram positis, paraphysibus paulo longioribus immixtis. Seta 4-5 lin. longa, gracilis, rubra, siccitate tortilis. Vaginula angusta, oblonga. Tlieca lanceolato-oblonga, inclinata, subinde erecta, ore angustato, demuin rafescens, siccitate substriata. Sporangium internum paido brevius. Annulus obscurus, opercido adhserens. Operculum basi conicurn, rostello brevi obliquo, interdum conicum, acuminatum, rectum. Peristomium breve ; dentes externi hyalini, transverse trabeculati, siccitate inflexi ; interni processus 16 lon°-iores, carinati, linea media notati, mernbrana basilari connexi, siccitate erecti, subincurvi. Sporce minimae, luteae. Cahjptra latere fissa, pallida, apice brunnea.
This differs from Orthodontium lineare, Schwaegr. (Suppl. 1. 188), in the oblong suberect capsule, and in the absence of terminal male flowers, thus deviating from the generic character proposed by Sehwaegrichen. In the inflorescence it agrees with the British Orthodontium gracile, Bruch and Schimper, but differs in the form of the capsule and the stronger nerve of the leaf.
Plate CLIII. Fig.Y. — 1, plant of the natural size; 2, leaf; 3 and 4, thecse; 5, peristome : — a)l magnified.
23. BRYUM, Bill.
1. Brytjm nutans, Schreb.; Hook, et Tayl. Muse. Brit. p. 203. t. 29. Fl. Antarct. pt. 1. p. 134.
Hab. Falkland Islands ; from the sea to the hill-tops, varying in size and habit. Hermite Island, Cape Horn ; in clefts of rocks in the woods, and on hard soil by streams.
A common Antarctic moss ; also a native of Lord Auckland's group. 2. Bryvm lacustre, Brid.; Bruch et Schimp. Bryol. Eurqp. Monogr. p. 16. t. 2.
Hab. Hermite Island; on sandy banks close to the brushwood a little above high water mark, St. Joachim's Bay.
3. Beyum bimum, Schreb.; Bruch et Schimp. I. c. p. 50. t. 21. Hab. Kerguelen's Laud (barren).
4. Bryum Billardieri, Schwaegr.; Suj)j)l. I.vol.ii. p. 115. t. 76 {non Bruch et ScMmp. 1. c. p. 58. t. 26.)
Hab. Falkland Islands ; on clay-slate rocks at Port Louis, rare and barren.
The European specimens, described by Bruch and Schimper, belong to B. Canariense, Schwaegr. (Suppl. t.214 b); we do not however contend for that moss being a really distinct species.
5. Be,ytjm argenteum, Linn.; Rook, et Tayl. Muse. Brit. p. 199. t. 29. Bruch et Schimp. I.e. p. 78. t.41.
Var. foliis arete imbricatis angustioribus acuminatis.
Hab. Falkland Islands; in sandy places near the sea, common. Cockburn Island, (barren).
This variety is connected with the ordinary states of the species by intermediate forms which Mathews gathered at Casapi (Peru). The Hookerian Herbarium contains a Brynm, collected by Humboldt in South America, with nmticous convolute leaves, allied to this, but probably a distinct species.
6. Brytjm caspititium, Linn.; Rook. et Tayl. Muse. Brit. p.201.t.29. Bruch et Schimp. I.e. p.70. t. 34.
Var. 0. gracilescens, Bruch et Schimp.
Hab. Strait of Magalhaens, M. Jacquinot. Falkland Islands, with unripe fruit. Var. £. Falkland Islands (barren).
