PLEUROPUS. 



469 



bus basi subrecurvis, acumine semitorto magis serrulato, prae- 



dita vena teuui medium paullo supra evanida. Areolae ob- 



longae, angustissimse conformes. 

 F. Pcrichaetialia lanceolato-oblonga, concava, longe cuspidato- 



acuminata, acumine patenti recurvate denticulato, evenia vel 



interiora interdum obsolete 1 venia. 

 Seta axillaris, rubro-nitens, vix uncialis, sicca valde tortiesu, 

 Vaginula, mediocris. 



Paraphyses plures filiformes, hyalinae interdum copiosissimae. 

 Pistilla plura. 



Capsula erecta, sequalis, basi obsolete apophysata, anuulata, 



rubro-brunnea. 

 Membrana interna distincta, sessilis. 



Peristomium exterius e dentibus 16, plano-subulatis, medio- 

 cribus fragilibus, rigidis linea longitudinali inconspicua no- 

 tatis, trabeculis, conventibus humore, siccitate patentissimis. 



Interius e membrana areolata altiuscula, membrana species 

 preccdentis duplo longiore, sedicies plicata, punctulata, irregu- 

 lariter-perforata, plicis exeuntibus in cilias setacea, fragillima, 

 longitudine fere dentium p. exterioris, subcarinatis opacis, 

 ciliolis brevius interdum dentiformibus, persistentioribus, 

 solitarius binisve intersectis. 



Sporula globosa, lsevia, immersa opaciuscula. 



Columella cylindracea, apiculata, inclusa operculum e basi co- 

 nica longe et oblique rostratum, capsulam subsequans. 



Calyptra dimidiata, laevis, cum operculo decedens. 



Cilia p. interioris fugacia, sunt, cave ne cum his ciliola persis- 

 tentiora confundas. An separandus ob membranam p. inte- 

 rioris perforatam, characterem insolitum, et cilia longa 

 magis evoluta. 



1 . Plant magnified. 



2. Cauline leaf. 



3. Perichaetial leaf. 



4. 3. Capsule. 



5. 6. Inner membrane, and inner peristome separated. 



6. Tooth of outer peristome. 



7. 8. Portion of inner peristome. 



8. 4. Operculum. 



