FISSIDENS. 



427- 



srepius simplices vix unciales, complanati, apicibus subdecli- 

 nati. 



Folia leviter falcata, prcesertim superiora secunda, obsolete re- 

 panda, m urguubus irregulariter et prajsertim apicem versus 

 denticulatis, vena in inucronem excurrente praedita, incon- 

 spicue areolata. F. perichaetialia convoluta, ensiformi-cuspi- 

 data, evanidivenia. 



Setae axillares, vix bilineales, curvatse, pallidas. Vaginula bre- 

 vis subcyliudracea. Paraphyses nullae. Pistilla plura. 



Capsula aequalis, ovata vel oblongo ovata, basi solida, fusco-viri- 

 dis sub lentem areolis oblongis inconspicue notata. 



Peristomium e dentibus 16, inadore conniventibus perparia sub 

 approxirnatis, conspicue trabeculatis, basi pulchre rubris caete- 

 rum albidis, ciliolis inaequalibus, sursum hyalinis, per totara 

 longitudinem et praecipuo apices versus mediantibus trabecu- 

 lis cohaerentes, ideoque dentes indivisi et crebre perforati 

 videntur. 



Sporula magna, in acervulo fusco-viridia, aliis rainutis immix- 

 ta, ideoque difforniia, immersa globosa, opaciuscula, sublaevia. 



Columella cylindracea, iuclusa, apice subcyathiformis. 



Operculum e basi convexa oblique rostratum, capsula subduplo 

 brevius. 



Calyptra dimidiata laevis, apice fusca, basi irregulariter fissa, 



marginibus leviter inflexis. 

 Species distinctissima prope D. adiantoidem locanda, habitu. 



Neckerae peristomioque didyraodontis gauden. 



1. Plant magnified several times. 



2. Leaf. 



3. Capsule. 



4. Portion of capsule and peristome seen internally. 



5. Operculum long section. 



6. Calyptra. It. Ass. 579. 



5. Fissidens nobilis, Griff. PI. LXXXIII. Fig. III. 



Caule simplici, foliis lineari-scalpelliformibus basi decurrentibus 

 marginibus incrassatis serrulatis setis lateralibus, folia exce- 

 dentibus, capsula ovato-oblonga nutante, operculo longe et 

 oblique rostrato. 



