Page:The Botany of the Antarctic Voyage.djvu/165

Campbell's Islands.] thecam paulo incrassata. TJieca suberecta, parvula, oblonga, basi obconica, seta concolor, apophysi angusta. Perislomium stramineurn. Operculum tlieca paulo brevius, basi conoideum, rostro recto cyHndraceo, margine submembranacea, seniitliaphana. Calyptra tliecse parimi longior, conico-subulata, fusco-lutea, apice rufo-fusca, basi ciliis plurimis coiifertis fimbriata.

A most beautiful little flaccid and tender species, of a pale straw colour, with the calyptra exactly as in Bawsonia splachnoides, Schwaeg., whence the species will form a connecting link between Baltonia and Hookeria (PterigophyMum, Brid.). It is not improbable that this curious structure of the calyptra, which appears to be of very rare occurrence in the genus, may, in conjunction with the erect theca and some other peculiarities, prove of sufficient importance to separate these species from all other Hookeria.

Plate LXII. Fig. I. — 1, a specimen of the natural size; 2, a leaf; 3 and 4, theca; 5, operculum; 6, calyptra : — magnified.

3. Hookeria denticulata, Hook. fil. et Wils. ; caule suberecto parce ramoso, foliis laxe Lmbricatis subquadrifariis lateralibus disticbis intermediis appressis subrotundis grosse dentatis nervo ad medium evanido, theca pendula ovata, operculo rostrato, calyptra glabra. (Tab. LXII. Fig. II.)

Hab. Lord Auckland's group and Campbell's Island; in wet and marshy places, not uncommon, rare in fruit, which was only seen in the former locality.

Caules pollicares, parce ramosi ; rami compressi, subincurvi, siccitate rigidi. Folia configuratione sat varia, late oblonga, ovata, v. obovata, obtusa, musco recenti micantia, pellucida, siccitate nigricantia, subcrispa, fragilia, madore tardius nervo valido plerunique furcato infra medium evanido interdum brevissimo, areohs majuscidis hexagonis; perichatialia parva, ovata. Seta § unc. longa, crassa, vix torta, rubra. Theca cernua v. pendula, elliptica, basi atteuuata, rufo-bruunea, opaca. Peristoma dentes extend flavi, lineis duobus rubris notati. Operculum rostra- turn, rectum, theca brevius. Calyptra conico-rnitrseformis, glabra, carnosa, rufo-fusca.

Our specimens want both the operculum and calyptra, the descriptions of which are taken from Tasmanian specimens. This species bears much affinity to H. quadrifaria, but is smaller and readily distinguishable by its dentate leaves. In general aspect it approaches the H. cristata.

Plate LXII. Fig. II. — 1, specimen from Cape Horn of the natural sice ; 2, a Campbell's Island specimen of the natural size ; 3 and 4, leaves : — magnified.

4. Hookeria pennata, Smith; caule erecto simplici, foliis bifariis verticalibus ovato-lanceolatis serratis subenerviis, stipulis orbicularis mucronulatis serratis, seta perbrevi, theca suberecta ovata, operculo conico acuminato. H. pennata, Smith, in Linn. Trans, vol. is. p. 277. Hook. Muse. Exot. t. 163. Cyathophorum, BriJ. Bryol. Univ. vol. ii. p. 722.

Var. /3, minor; foliis rotundatis concavis fusco-olivaceis. (Tab. LXII. Fig. III.)

Hab. Lord Auckland's group ; in the dark woods, barren : var. /3, on decaying stumps of trees by a water-course, also barren.

The var. /3 is certainly not entitled to rank as a species, though at first sight its difference appears striking. Another form, probably also a variety, with very narrow leaves, has been sent from Assam by Mr. Griffith, under the name of Neckera Adiantum, Griff. MSS. Hookeria pennata, on account of its accessory leaves (stipules), appears most naturally allied to those species included by Bridel in Hypopterygium ; it is only in the much advanced state that the vagimda becomes hollow and cup-shaped, whence Bridel's name of Cyathophorum is scarcely tenable, considering that the vaginula in other species of Hookeria is very turgid. The calyptra is truly mitriforrn.

We have New Zealand specimens of this magnificent moss, nearly a foot long and loaded with theca?.

Plate LXII. Fig. III. — 1, a specimen of the natural size; 2 and 3, leaves : — magnified.