510 Muscologia Itineris Assamici. 



3. Didymodon longifolius, Griff. 



Caule simplice flexuoso, foliis patentissimis squarrosis lanceolato- 

 linearibus carinatis subintegerrimis, capsula cylindracea, pe- 

 ristomii dentibus sedecim, operculo longe subulato. 



Hab : Ripse Surureem. 



Caulis vix semuncialis. Folia siccitate marginibus involuta, 

 tortilia, humore patentissima vel patenti-recurva, superiora 

 ascendenti-patentia, raro subsecunda, e basi anguste lanceolata 

 linearia, longa, concavo-carinata, sub lente fortiter augente 

 minutissime crenulata, percursa vena in apiculo diaphano brevi 

 subexcurrente ; areolis minutis quadratis. 



F. Perichsetialia conformia, majora, ascendentia. 



Seta terminalis, capillacea, siccitate spiraliter torta, vix 8 linealis. 



Vaginula cylindracea, angusta. Paraphyses pauca?. Pistilla 

 plura, stybs longis. 



Capsula anguste cylindracea, brunnea, sicca irregulariter sulcata ; 

 os incrassatum, rubro-coccineum. 



Peristomium siccum erectum, madidum, connivens, e dentibus 

 16, brevibus setaceis subinsequalibus, simplicibus perparia 

 (ssepe obsolete) infra medium ope trabecularum irregulariter 

 nexis, subdiaphanis, transversim, obsolete Hneats, irregulariter 

 marginatis, aurantiaco-rufis compositum. 



Sporula rotundata, lsevia, in acervulo, fusco-lutescentia, immersa 

 hyalina immixta corpusculis aUquoties majoribus rotundatis 

 opacis. 



Columella truncata, filiformis, inclusa. Operculum e basi brevi 

 conica longe recteque subulatum, capsula dimidio brevius. 



Calyptra dimidiata, parte fissa semel torta. 



D. squarroso, Hook, propinquius, discrepans caule simplici, 

 foliis angustioribus integris, dentiumque peristomii nu- 

 mero. 



4. Didymodon perichatialis, Griff. 



Cuale elongato ramoso, ^foliis patentissims lanceolato-linearibus 

 carinatis acutis marginibus incrassatis integerrimis, perichaetia- 

 libus interioribus circa setam convolutis longissime subulato- 



