Gen. II. Rhegmatodon Brid. 



Bryol. univ. II. 1827, pag. 204. — Schivgr. 1827. - Montague 

 1842. — Rhegmatodon, sectio a, C. Midi. Synops. 1850; Rheg- 

 matodon, sectio 1. Anhymenium C. Mull, in litt. 1882. — 

 Mitten 1858, 1868. — S. 0. Lindherg 1862. — Bryolog. Javan. 

 1864 vel 1865. — Schimper. — Bsch. 1871 p. parte. Jaeger, 

 adumbratio 1876—79. 



Pterogonium Hooker 1808. Anhymeniu m Griff. 1838. 

 — Macrohymenium Bzy. et Mlkb. p. p. 1848, Jaeger, 1. c (M. 

 scrrulatum). 



Nomen a graeca voce ffiypa. fissura et o&ou'c dens, processuum 

 peristomii interni rimam longitudinalem designaturum. 



Plantae opacae rami adscendentes, axis ramorum flava vel 

 fuscescens, folia caulina parva inter radiculas abscondita ovata 

 breviter et non raro curvato-acuminata, unicostata. Folia ramea 

 ovata vel oblongo-ovata breviter oblique acuminata margine reflexa 

 costa medio vel ultra evanida munita, cellulis ellipticis 1 ca. 10 p. 

 latis, 15—20 \i. longis (2.0—2.5) sparsis, i. e. non seriatis, parieti- 

 bus incrassatis. Cellulae basales angulares indistinctae, margi- 

 nales una serie a basi ultra medium quadrato-rectangulae. 



Antheridia paraphysibus copiosis e cellulis multis compositis 

 breviora; perichaetialia tenera pellucida, externa minima e basi 

 subrotunda subito breviter acuminata ecostata, media mediocria 

 e basi ovata subito acuminata, interna longiora lanceolata sen- 

 sim acuminata obsolete vel tenui-costata; areolatione laxiore cel- 

 lulis elongato-pentagonalibus vel hexagonalibus, basi rectangulis. 

 Pedicellus rigidus, non tortilis, laevis vel papillosus. 



Capsula erecta vel cernua, ovata, oblonga vel cylindrica sub 

 ore constricta, laevis Operculum breve conicum obtusum capsu- 

 lae deoperculatae longitudinis partem fere dimidiam — quartam ae- 

 quans ; dentes perist. extern, lar.ceolati obtusi lineaque divisurali 

 muniti interne dense val.le trabeculati, processus perist. intern, 

 dentibus !7*-3plo longiores, rima longitudinal! mediana a basi 



