8 



P. DUSEN, MOSSES FROM THE WEST OOAST OF AFRIOA. 



canaliculata, marginibus integerrimis, inferne rectis, superne plerumque plus minusve 

 reflexis, nervö valido, basi 0,06 — 0,os mm. crasso, laivissimo percnrsa, cellulis elongatis, 

 chlorophyllosis, subrectangulis, inferioribus majoribus; braciece perichwtii foliis similes; 

 vaginula cylindrica; seta érecta, siccitate subcurvata et sinistrorsum torta, humiditate 

 stricta, usque ad 9 mm. älta et medio 0,09 mm. crassa, pallide flavo-viridis, vetusta pallide 

 brunnea, laevissiina; t/ieca erecta, ovalis, symmetrica, 0,72 mm. älta et 0,5 mm. crassa, 

 brunnea, siccitate scrobiculata, vix sub öre constricta, collo subnullo, annullo distinctissimo; 

 peristomium simplex; dentes 16, humiditate vix conniventes, siccitate erecti, omnino 

 aequilongi, simplices, integri vel plus minusve perforati vel plerumque usque infra medium 

 in lacinias binas fissi, basi aurantiaci, superne pallidiores, lanceolati, inferne trabeculati, 

 longitudinaliter rugosi, rugis punctulate papillosis, superne valde papillosi; operculum 

 minute conicum, longe oblique et subulate rostratum; calyplra pallida, cucuUata, circiter ad 

 mediam thecam producta; sporcp, rotundae, subfuscae, granulosae, 0,oi3 — 0,oi6 mm. magnaj. 



Habitat in territorio Oil Rivers in humo, ubi ad Old Calabar m. Jnlio a. 1892 c. fr. legi. 



i. ,• 32 ^ n . . , 200 „ . , , 100 , 32 



b\g. a, loha — ; o, cellalae apicnles ; c, cellula: basaies ; a, capsula calyptrata — ; e, capsula 



32 32 32 



operculata humiditate — ; /, capsula operculata siccitate — ; g, capsula deopeiculata humiditate ■ — ; h, capsula 



deoperculata siccitate 



32 



Pl. 00, tig. 29, planta magn. nat. ; tig. 30 et 31, partes peristomii 



200 



Dicranella afro-exigua C. Muller n. sp. in litt. 



Dioica, sat dense cnespitosa, ca9spitibus parvis, humillimis, flavescente viridibus; caulis 

 minutus, usque ad 3 mm. longus, inferne plerumque simplex, superne ramulis nonnullis 



brevissimis, dense foliosus, e substrato patentissimus ; folia usque ad 1,8 mm. longa et basi 

 circiter 0,28 mm. lata, siccitate inferiora arcuate patentia vel patula, superiora erecta, humidi- 



