34 P. DUSEN, MOSSES FROM THE WEST OOAST OF AFRICA. 



subjulaceo-imbricata, semiamplexicaulia, e basi ob ålas raagnas cordata et compressa raptira 

 dilatata, deinde sat subito attenuata et breviter acuminata, turgescente concava, capulae- 

 formia, marginibus integris vel acumine excepto ubique minutissime serrulatis, enervia; 

 cellulce elongatae, angustissimae, lineares, superiores aureo-brunnese, inferiores pallidiores, 

 basales plerumque pallide virides, breviores et latiores, parietibus incrassatis et interruptis, 

 alares sat paucse et minutse; folia ramulina plus minusve distincte quinque-seriata, parum 

 minora, ceterum foliis rameis similia; cetera ignota. 



Caespitosus, casspitibus densis, expansis, intricatis. 



Habit at in Camerunia in ramnlis arborum, ubi supra Beam pagum c. 1,600 metra supra 

 mare m. Julio a. 1891 legi. 



A particularly distinct species, very different from all others of tlie same genus, that were 

 collected by me in the Oameroons. Found only on the south-east side of the Oameroons Mountain. 

 Does not appear to occur on the west side of the same mountain; in the neighbourhood of Bomana 

 for instance, I did not find it, although I made many excursions, aseending to a height of 1,200 m. 



32 32 



Fig. a folia ramea — ; b folia ramulina — . 



Pl. III. fig. 1 planta magn. nat. 



Distichia Afro-Victoriae C. Muller n. sp. in litt. 



Dioica viridis vel lutescente-viridis, subsericea, propendens, usque ad 16 cm. longa; 

 caulis longe repens, plerumque remote ramosus; rami complanati, cum foliis usque ad 4 

 mm. lati, stricti vel leniter arcuati, plerumque remotissime irregulariterque pinnati, ramulis 

 cum foliis usque ad 4 mm. latis, patentissimis, haud attenuatis, complanatis, apice rotun- 

 datis, plerumque brevibus; folia disticha, patentissima, undulata, e basi uno latere im- 

 pressa et angustiore in laminam oblongo-lingulatam, truncatam producta, subasymmetrica, 

 uno latere valde auriculata, auricula perinflexa, marginibus uno latere inflexis, ceterum 

 planis, fere ubique minutissime serrulatis, costa unica, concolori, ad 2 /3 folii evanescente 

 producta, stricta vel leniterrime arcuata, rarissime superne furcata; cellulis apicalibus sat 

 parvis, diversiformibus, plerumque rotundate rhombeis vel ellipticis, medianis paullum 

 longioribus, basalibus elongatis; bractece perichoBtii vaginantes, erectaB, oblongae, elongate 

 acuminatae, capsulam plerumque superantes, nervö longe supra mediam bracteam evanido, 

 marginibus summo tantum minutissime denticulatis, cellulis magis elongatis; vaginula 

 cylindrica; seta brevissima; theca immersa, ovato-cylindrica, humida paullum, sicca magno- 

 pere sub ore constricta, laevis; peristomium duplex; dentes exostomii 16, pallide flavi, 

 lanceolati-subulati, 0,378 mm. alti et 0,032 — 0,043 mm. lati, humiditate conniventes, siccitate 

 lenitei" reflexi, superne arcuate inflexi, subconniventes, nodulosi, lamellosi, granulosi, linea 

 media plus minusve distincta notati; dentes endostomii filiformes, pallide aureo-brunnei, 

 0,432 mm. longi et 0,oie mm. lati, lamellosi, linea media indistincta notati, interdum in- 

 ferne minutissime perforati, minus granulosi, membrana basilari brevissima; operculum 



