402 FLORA VITIENSIS. 
ciliisque tribus interpositis in membrana usque ad medium dentium longitudinis exserta impositis.— 
Ovalau (Seemann! n. 845, Milne! n. 351). Also in Sandwich Islands (Herb. Hooker!), Samoa, 
Tutuila (Powell ! n. 111), Ceylon, and in the Malay Archipelago. 
Foliage green and shining, becoming in age straw-coloured and fulvous. 
XXIV. Thuidium, Schimp. Caulis procumbens ascendensve, interdum arcuatus, apicibus de- 
scendentibus radicantibusque, exinde prolifero-continuatus, paraphyllis obtectus, rarius pudus, ramis 
ramulisque bipinnatim dispositis bi-tripinnatus. Folia caulina æqualia, ramea ramulinaque diversi- 
formia, inæqualia, cellulis elongatis vel abbreviatis, sæpius papilliferis obseuris. Theca inclinata 
horizontalisve, rarissime erecta, peristomio perfecto vel ciliis interdum imperfectis obsoletisve. 
The following two species have not yet been gathered in Viti, viz.:—1. Т. plicatum (sp. nov.), Mitt. ; 
caulis procumbens, irregulariter bipinnatus; folia patentia, cordata, acuminata, plicata, breviuscula, margine 
inferne reflexa, superne minute crenulata, nervo sub apice evanido, cellulis rotundatis obseuriuseulis papillis 
minutissimis brevissimis, ramea subcompressa patentia cordato-acuminata plicata, ramulina imbricata ovata 
acuta concava erenulata dorso papillosa, perichætialia a basi lanceolata sensim longe attenuata serrulata ; 
theca in pedunculo elongato eylindracea inæqualis inclinata.—Sandwich Islands (Douglas! in Herb. Hooker). 
— More slender than 7. Samoanum, and less regularly-branched than 7. ramentosum. 2. Т. crenulatum (sp. 
nov.), Mitt.; monoicum; caulis bipinnatus; folia patentia cordata subulato-acuminata, nervo sub apiee 
evanido, margine erenulata, inferne subrecurva, cellulis rotundatis obscuriusculis, ramea compressa ramu- 
linaque ovata acuta nervo carinata crenulata, perichetialia longe subulato-attenuata subserrulata; theca 
in pedunculo elongato ovalis horizontalis, operculo subulato ; peristomium internum eiliis binis inter se 
cohærentibus trabeeulatis.—Sandwich Islands (Douglas! in Herb. Hooker 57).—Similar to 7. minutulum, 
Hedw. Muse. Frond. 4. t. 34. | 
1. T. ramentosum, Mitt. in Bonpl. 1861, р. 366 (Leskea); caulis arcuatus, proliferus; folia 
caulina a basi lata hastata cauli angustiore subulata, nervo percurrente, margine reflexa integerrima, 
ramea hastato-ovata acuminata, ramulina ovata incurva papillosa, margine ut in rameis crenulato- 
serrulata, nervo infra apicem abrupto, dorso prominente cristato, perichetialia interiora in ramentis 
quamplurimis elongatis flexuosis intricatis serrulatis lacera.— Viti (Seemann ! inter 863). 
Very like the T. cymbifolium, Dozy et Molk. Bry. Javan. t. 221, from Java and India, but more 
slender. 
2. T. Samoanum, Mitt. Journ. of the Proceed. Linn. Soc. 1868, p. 186; caules procumbentes, 
erecti arcuatique, pinnæformiter bipinnati; folia caulina appressa a basi subtriangulari-ovata 
sensim in acumen ligulatum obtusiuseulum producta lævia, nervo infra apicem evanido, margine 
crenulato, cellulis rotundis, papillis fere obsoletis, perichætialia interna a basi lata sensim angustata 
et in acumen elongatum loriforme flexuosum obtusum crenulatum producta, marginibus inferne ciliis 
pluribus elongatis angustis ciliata; theca in pedunculo elongato cylindracea, arcuata, horizontalis.— 
Viti (Seemann!). Also Solomon Islands, Guadalcamar (Milne !), Samoan Islands, Tutuila, and 
Manua, on large stones in gulleys (100-2000 feet) (Powell ! 105). 
Nearly allied, as so many of the species of this genus are, the present, although externally closely 
corresponding with 7. ramentosum, is well distinguished by its obtuse cauline leaves. 
3. Т. erosulum, Mitt. Journ. of the Proceed. Linn. Soc. 1868, p. 186; monoicum; caulis 
repens, intricatus, bipinnatim ramosus ; folia patentia triangularia subulato-acuminata, nervo sub 
apice evanido, marginibus reflexis subintegerrimis, cellulis obscuris, papillis brevissimis; folia ramea 
ovata acuta, ramulinaque ovata obtusiuseula compressa, nervo pallido dorso scabro carinata, margi- 
nibus crenulatis, cellulis papillosis obscuris areolata, perichætialia ovata superne denticulata exinde 
longe subulata anguste attenuata subintegerrima, nervis pereurrentibus; pedunculus elongatus, 
scaber; theca oblonga, subhorizontalis, operculo subulato ; peristomium internum ciliis іп unum 
