16 



P. DUSEN, MOSSES FROM THE WEST COAST OF AFRICA. 



denticulato-serratis, ceterum integerrimis, limbata, limbo circumducto, ad medium folium 

 0,oi3 mm. lato, nervö tenui, basi 0,03 mm. crasso exarata, cellulis inferioribus breviter, 

 superioribus elongate rectangulis; bractece perichcetii foliis similes; seta stricta, erecta, 

 brunnea, usque ad 7 mm. longa, medio 0,os mm. crassa, laevissima; theca erecta, strida, 

 svinmetrica, oblongo-cylindrica, 1,45 mm. longa et 0,5 mm. crassa, siccitate sub ore vix 

 vel haud constricta, subsulcata; peristomium simplex, cerineum; dentes 16, humiditate 

 conniventes, siccitate subretiexe erecti; operculum conicum, longe strieteque subulate rostra- 

 tum, rostro theca multo breviore; calyptrå pallida, cucullata, fere ad basim theca? producta. 



Habitat in Camerunia in truncis ramisque arborum, ubi prope Batoki pagum m. Octobri 

 a. 1890 c. fr. vetustis et ad Love emporium m. Majo a. 1891 c. fr. legi. 



Fig. a, folia — ; b et c, pars superior folii ; d, pars superior folii a latere visa — ; e et f, capsulre 



18 , , 18 , . . . 18 ... 200 

 calyptratse — ; g, capsula cum operculo — ; A, pars superior capsulae siccitate — ; i, pars peristoran . 



Pl. 00, fig. 42, planta magn. nat. 



Leucophanes denticuspis C. Muller n. sp. in litt. 



Laxiuscule caBspitosum, caespitibus albidis, sat parvis, haud nitidis; caulis fragilis, 

 strictus, erectus vel suberectus, usque ad 2,5 cm. longus, simplex vel plerumque ramosus, 



dense foliosus, intima basi radiculosus; folia e basi subvaginante erecto- 

 patentia vel patentia, stricta, lineari-lanceolata, acuminata, usque ad 

 6,3 mm. longa et 0,45 mm. lata, inferne canaliculata, superne planiuscula, 

 marginibus planis, ad medium folium remote, apicem versus et summo 

 dense aculeate serratis, ceterum integerrimis, limbata, limbo circumducto, 

 ad medium folium 0,oi3 mm. lato, nervö tenui, l)asi 0,035 mm. crasso, 

 superne dorso remotiuscule minuteque aculeato percursa, cellulis basalibus 

 et apicalibus sat breviter rectangulis; bractew perichcetii foliis similes; 

 archegonia perpauca; paraphyses nullae; cetera ignota. 



Habitat in Camerunia in truncis arborum, ubi prope Basse pagum m. 

 Octobri a. 1890 legi. 



Standing near to tbe last species, but very distinct; differing in the 

 more denticulate upper part of tbe leaves and the aculeated dorsal side of the 

 topmost part of the nerve. 



Very loosely tufted or growing amongst other mosses. 



ev 18 ; • rr- 142 



Fig. a, folium — ; />, pars superior loin — — . 



Pl. 00, tig. 43, planta magn. nat. 



