OF ARTS AND SCIENCES. 279 



imbricatis, comalibus lanceolatis longe acuminatis costa cnspidatis su- 

 perne denticulatis laxius oblongo-areokitis marginibus anguste revolutis ; 

 capsula pendula globoso-pyriformi microstoma annulata ; perist. intern, 

 ciliis linearibus perforatis, ciiiolis subnullis ; operculo depresso-conico. 

 Arakamchetchene Island, Behring's Straits. 



IG. Bryum megalodictyon (sp. nov.) : dioicum, pusillum ; foliis 

 erectis superne congestis oblongo-ovatis acutis concavis evanido-costatis, 

 cellulis hexagono-oblongis amplissimis ; capsula suberecta oblongo- 

 pyrifbrmi annulata ; ciliis perist. intern, linearibus ciiiolis nullis ; 

 operculo hemisphtBrico-conico papillato. 



" On walls at the Capitol," Loo Choo Islands. 



17. Bartramia inserta (sp. nov.) : dioica, exigua, dense ca^spi- 

 tosa, luteo-viridis ; foliis suberectis lineari-lanceolatis attenuatis sparse 

 papillosis toto ambitu serratis marginibus recurvis, costa subpercur- 

 rente ; capsula erecta globosa sulcata gymnostoma ; operculo convexo 

 minute conico. 



On damp vertical rocks among hills, near Simon's Town, Cape of 

 Good Hope. 



18. Hypnum assurgens (sp. nov.) : dioicum, homophyllum ; caule 

 arcuato-assurgente subpinnato-ramuloso eparaphylloso ; foliis erecto- 

 incurvis apei-tis e basi lata cordato-ovata lineari-lanceolatis papillosis 

 apice serrulatis marginibus revolutis cellulis guttulatis opacis, costa 

 pellucida sub apice evanida ; capsula gibboso-pblonga cernua annulata ; 

 pedicello tuberculoso ; operculo longirostrato ; peristomio normali. 



On decayed logs, shady hill-sides, Ousima, Loo Choo Islands. 



19. Hypnum dispersum (sp. nov.) : monoicum ; caule prostrato 

 diviso pinnato-ramuloso paraphylloso ; foliis patentibus e basi late 

 ovata subito lanceolato-attenuatis serrulatis papillosis, costa (prsecipue 

 in pericha3tialibus) valida sub apice evanida ; capsula oblonga vel 

 cylindracea curvula ' horizontal! annulata ; operculo convexo-conico 

 obtuso. 



On dry ground, shaded hill-sides, Simoda, Japan ; and Loo Choo. 



20. Hypnum oblongifolium (sp. nov.) : monoicum, prostratum, 

 subpinnatum ; caulibus ramisque laxius compresso-foliosis ; foliis e basi 

 brevissima convoluto-angustata oblongis acutis apice serratis lineari- 

 areolatis ; capsula (an normali ?) gibboso-ovali inclinata ; operculo 

 convexo-conico apiculato ; peristomio hypnoideo. 



Hong Kong, China. 



