DUSEN : PATAGONIAN AND FUEGIAN MOSSES. IOI 



alta, gracilis, rubra, strictiuscula, superne sinistrorsum, inferne dextror- 

 sum torta, laevissima; theca fere erecta, cylindrica, paulum curvata, pal- 

 lide brunnea, siccitate sub ore constricta, laevissima, collo distincto ; annu- 

 lus simplex ; denies exostomii pallide flavi, 0.44 mm. alti et basi 0.06 mm. 

 lati, anguste lanceolati, dense lamellati, inferne medioque trans versaliter 

 striati, superne articulati et papi\losi ; denies endostomii hyalini, dentibus 

 exostomii paulum breviores, subulati, minutissime granulosi, angustissime 

 longitudinaliter perforati ; cilia 1-3, setacea, nodulosa, minutissime granu- 

 losa, dentibus endostomii paulum breviora; membrana basilaris c. o. 18 

 mm. alta ; operctilnm conicum, obtusum, haud rostratum. 



Flores masc. gemmiformes, ad basin floris fern, dispositi, in tomento 

 occulti. 



Hab. speciei Patagonia australis, ubi verisimiliter in territorio fontinali 

 fluminis Rio Chico lecta est. 



Completely resembling and closely allied to Plagiothecium ptilchellum 

 (Dicks.) Br. Eur., but differing from that species by its usually broader 

 and longer cuspidate leaves, more uniform leaf-cells, inner peristomial 

 teeth shorter than the outer, and its simple annulus. 



The species also resembles, to judge from the diagnosis, Plagiothecium 

 fiicgianuin (Besch.) differing by its subfalcate and more or less distinctly 

 secund leaves with straight apex, non-papillous perichaetial leaves and 

 cylindrical capsule. 



Fam. HYPNACE.E. 

 Gen. BRACHYTHECIUM Br. Eur. 



BRACHYTHECIUM PARADOXUM (Hook. fil. et Wils.) Besch. 

 Hab. Patagonia australis in territorio fontinali fluminis Rio Chico, ubi 

 in truncis putrescentibus et in terra occurrit. 



Gen. SCIAROMIUM Mitt. 



SCIAROMIUM CONFLUENS C. Milll. 



Hab. speciei Patagonia australis, ubi verisimiliter in territorio fontinali 

 fluminis Rio Chico lecta est. 



SCIAROMIUM DEPASTUM Dusen n. sp. 

 Pi. XI, Fig. 2. 



Dioicum; densiuscule caespitosum, caespitibus expansis, rigidis, superne 

 laete viridibus inferne pallide brunneis ; caulis strictus, erectus, usque ad 



