1. Bartrahia patens, Brid. ; caule erecto subramoso, foliis patentibus rigidis linearibus aeuminatis serrulatis basi dilatatis vaginantibus, tlieca obliqua, operculo couvexo. B. patens, Brid. Bri/ol. Univ. vol. ii. p. 38. Schwaeg. Suppl. vol. i. pt. 2. p. 55. t. 62. B. squarrosa, Turner in Koenig's Annals of Botany, vol. i. p. 583. t. 2. f. 2.
Hab. Campbell's Island ; on rocks, half way up the lulls ; barren. Allied to B. ithyphylla, Brid.; but larger, with the leaves longer and more dilated at the base.
2. Baiitramia robusta, Hook. fd. et Wils. ; caule erecto subramoso, foliis patentibus rigidis subulatis serrulatis basi quadratis vaginantibus nervo lato continuo, seta crassiuscula, theca erecta, operculo coirico rostellato. (Tab. LIX. Fig. IV.)
Hab. Lord Auckland's group and Campbell's Island ; in moist places, especially towards the tops of the bills ; barren in the latter island.
Caules csespitosi, pollicares, robusti, basi radiculis intertexis fuscis dense obtecti et connexi. Folia densa, rigida, subfragilia, nervo latissimo crasso superne supra paginam folii totani extenso, flavo-viridia, inferiora subrufescentia. Infiorescentia dioica ; Fl. masc. teraiinalis ; antheridiis plurimis oblongis, paraphysibus longioribus immixtis. Seta 8 lin. longa, valida, baud torta, rubra. Theca erecta, globosa, brunnea, siccitate sulcata. Peristomium non visum, an nullum ? Operculum couico-rostellatum, luteum. Calyptra fusca.
A more robust species than the B. patens, with broader and more rigid leaves, their dilated bases truly quadrate. The capsule is perfectly erect and the operculum rosteliate. It essentially differs from the former in the dioecious inflorescence. The thecae are not in a fit state to show the peristome, if this moss really possesses one, of which we have some doubt. This is not distinguishable from the B. potosica of Montague (Ann. Se. Nat., 2nd Series, vol. ix. p. 56), judging only from the description of that author ; but an examination of authentic specimens proves the two truly distinct, the latter being more closely allied to B. patens, though having shorter leaves with their bases not quadrate, but oblong or almost obovate.
Plate LIX. Fig. IV. — 1, plant of the natural si;e ; 2 and 3, leaves ; 4 and 5, theca ; 6, old ditto ; 7, calyptra: — magnified.
3. Barteamia pendida, Hook.; caule subpinnatim ramoso fastigiato, foliis ovato-lanceolatis longe aciumnatis-serrulatis striatis nervo continuo, tlieca pendula ovato-globosa subcyliudracea sulcata, operculo planiusculo. B. pendula, llooh. Muse. Exot. t. 21. Philonotis pendida, Brid. Bri/ol. Univ. vol. ii. p. 27. Milium pendulum, Smith in Linn. Trans, vol. vii. p. 262.
Hab. Campbell's Island ; frequent in marshy places, always barren.
Variable in aspect and sometimes resembling B. fontana.
19. BRYUM, Bill.
Peristomium duplex ; exterius dentes sedecim, asquidistantes, lanceolati, simplices ; interim membrana tenera, sedecim cariuata, in processus totidem dorso earinatos producta, ciliis aut mulis aut plurimis filiformibus interjectis, dentibus extends oppositis. Calyptra parvula, cuculbfonuis. Theca inclinata v. pendula, oblonga, pyriformis v. clavata, plerumque annulata, collo brevissimo v. elongato instructa. Caules apices verms innovantes. — Bryurn, "VVebera, Pohlia, Cladodium, et Ptychostomum, Bridel et auctorum. In the generic character, given above, we have closely followed that of Bruch and Schimper (Bryol. Europ.), though not satisfied of the propriety of excluding Mnium.
