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longitudinaliter plicatula, m argine erecta apice denticulata, cellulis densissime linearibus veluii conflatis 

 tenerrime papillosis rigidiuscula veluti striatula, acumine saepius producto aciculari integrinseulo, nervis 

 binis brevissimis obsoletis, cellulis alaribus unica hyalina fugaci excepta vix ullis; pericli. multo m'ajora 

 erecto-appressa, externa minora reflexa, semiamplexicaulia, e basi latiuscule lanceolata longa in acumen 

 elongatum parum tortum denticulatum loriforme protracta, infimo excepto densissime lineari- areolata 

 enervia; tlieca in pecl. longiusculo rubro levi apice parum cygneo horizontalis siccata nutans, minuta 

 cj^atliiformi-hemisphaerica macrostoma parum major ore haucl constrieta, cellulis paulisper convcxis asperula, 

 siccata pro more cyathiformi-ovalis; peristomium multo robustms, dentibus externis pallidis, i »terms tatis 

 compressis aurantiacis levibus in membrana alta positis medio Iiiantibus, ciliis singulis robustis asperis. 



Patria. Fidschi-insulae, Ovalau, inter Hookeriam oblongifoliam dense intricatum. Samoa-insulae, 

 Tutuila, Upolu in truncis ßhizopliorarum. 



Ab H. Chamissonis simillimo signis datis, ab II sodali foliis papilliferis jam priuio visu distinctum. 

 Ab Hypno Tutuilo teneritate affini inflorescentia jam differt. Planta gracillima, foliis striatulis papillis 

 singulis tenerrimis obtectis et fructibus rugulosis facile cognoscenda. Medium tenet inter Cnpressinas et 

 Sigmatellas et melius forsan ad ulteriores pertinens. 



100. Hypimm (Sigmatella) Tongense n. sp. ; monoicum; parvulum dense appressum prostratum vage 

 ramosum compressum sordide virens nitidulum latiuscule cespitosulum; folia caulina erecto-patula, siccitate 

 autem erecto-conferta, e basi fibrosula cellulis alaribus singulis majusculis hyalinis deciduis praedita constrieta 

 et angustatä anguste oblonga in acumen longiusculum acutum plus minus obliquum protracta, integerrima 

 (vel papillis vix obsolete denticulata), caviuscula enervia, e cellulis angustissimis elongatis tenuibus seriatim 

 punetulatis parum chloropliyllosis areolata; ad apicem ramuli gemmulam clausam erectam sistentia; perich. 

 pauca e basi vaginatula laxius reticulata ovatä in acumen longius producta: tlieca in ped. longiusculo 

 tenero rubro glabro inclinata minuta cylindraceo-oblonga ore constrieta macrostoma amblystegioides fusca 

 glabra; perist. dentes ext. breves lutei linea longitudinali exarati, int. breviores tenerrimi rugulosi carinati 

 haud perforati, ciliis singulis interpositis. 



Patria. Tonga-insulae, Tongatabü: Dr. Ed. Graeffe. 



101. Hypnum (Sigmatella) rhisophoreti n. sp.; monoicum; minutulum tenerrimum intricatum repens, 

 ramis irregulariter pinnatis vage ramosum, e luteo pallescens, plumosulum • folia caulina sicca et madefacta 

 erecto-patula vel patentia minuta setacea, e basi constrieta brevissima anguste lanceolato-acuminata, acumine 

 acute longiusculo refiexo vel semitorto coronata, caviuscula saepius parum complicata sed valde aperta nec 

 involutacea, enervia, e cellulis angustissimis elongatis scariosis pallidissimis seriatim tenerrime papillosis 

 areolata, cellulis alaribus paucis obsoletis minutissimis hyalinis saepius inconspieuis praedita, integerrima 

 sed ob papillas minutissimas crenulata; pericli. pauca majora longiora pallidissima, e basi semivaginante 

 lanceolata elongate acuminata, e cellulis incrassatis ad acumen subulatum solum papillosis areolata; tlieca 

 in pecl. tenerrimo rubro glabro flexuoso pro plantulae magnitudine elongato inclinata minutissima gibboso- 

 ovalis, basi interdum distinete strumosula, leptoderma glabra: peristomium tliecam subaequans, dentibus 

 externis angustissimis luteis linea media profunde exaratis, latere cristatis, asperulis, internis multo 

 angustioribus complicatis parum perforatis aurantiacis. ciliis singulis obsoletis, operculo brevi conico 

 obtusulo veluti abrupto. 



Patria. Samoa-insulae, Tutuila, inter alios muscos. Upolu, in rliizoplioretis inter Hypnum 

 eyathothecitem. 



H. tenuisetum proximum foliis setaeeis involutaeeis et fructibus aequalibus jam recedit. Ab 

 H. Orthothecio teneritate maxima, foliis nunquam involutaceo - subulatis et tlieca inclinata distinguitur. 

 E tenerrimis sectionis. Elores masculi in vicinia fioris feminei plures minutissimi. 



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