MK. W. mitten's list OF SAMOAN MOSSES. 187 



PoROTRiCHUM ELEGANTTSSiMUM, sp. D. Dioicum ; stipes brevis, 

 foliis paucis patulis ovatis, superne in frondcm eleganter plumaeformi- 

 bipinnatim ramosain expansus; folia in rami priraarii medio com- 

 pressa, lateraliter patentia, ovata, apice latiuscule acuta, nervo infra 

 apicem desinente, marginibus apice serrulatis, cellulis superioribus 

 rotundis, mediis oblongis, basalibus elongatis ; folia ramiilina minora, 

 conformia ; perichaetialia a basi lata, suborbiculata, subulata. 



Hab, Tutuila, on living trees near Letaumata and elsewhere (1000 ft.). 

 No. 33. 



In habit and size resembling NecTcera anacamptolepis, C. Miiller, 



Bryol. Javan. t. 186, but with leaA^cs not undulated. 



M 



Phyllogonium angustifolium, Schimp. 



Hab, Samoa, on living trees in all the islands, principally in the low 

 woods. No. 35, 



Agrees exactly with a specimen from the Marquesas Islands 



given bj Dr. Schimper. 



Rhacopilum convolutum, C. MulleVy Syn, ii. p. 13. 

 Hab. Upolu, near Tafua-a-Upolu (1000 ft.)- No, 39. 



All the specimens without fruit, but probably referable to this 

 species. 



R. SPECTABILE, ReinvJ, et Hornsch, BryoL Javan, t. 144 et 145. 

 Hab. Tutuila, on trees (2000 ft.). No. 65. 



PowELLiA, gen. nov. 



Caulis repens. Polia diversiformia, superiora minora, inferiora 

 majora. Pructus lateralis. Theca aequalis, pedunculata. Ca- 

 lyptra latere fissa (l^e^ds ?). 



P. INVOLUTIFOLIA, sp. n. Caulis prostratus, repens, ramosus, latere 

 inferiore densissime radiculosus ; folia heteromorpha, subsexfaria, se- 

 riebus duabus superioribus minoribus ovato-ligulata, obtusa subacu- 

 tave, sursum patentia recurvave, seriebus inferioribus utroque latere 

 binis lateraliter patenti-divergentia, paginis eorum superioribus ad 

 caulis latus superius spectantibus, oblonga obtusa obtuseve acuta, 

 apicibus sursum curvatis, statu sicco arete invpluta, margine infeme 

 ad caulis latus superius sinuato-incurvo, ad latus, inferius appressa 

 iinbricata, ubique limbo angusto cartilagineo pallidiore superne indi- 

 stincte serrulato integerrimove circumducta, nervo concolori setate 

 nifescente sub summo apice evanidg, cellulis parvis rotundatis utraque 

 pagina papilliferis inde subobscuris viridibus ; perichaetia e latere 

 caulis superiore orientia, basi radiculosa, foliis erectis ovato-lanceo- 

 latis basi truncatis apice acuminatis, vaginulam crassam filis elongatis 

 pellueidis barbatam vix tegentibus, cellulis elongatis areolatis; pe- 

 dunculus elongatus, crassus, superne trigonus; theca erecta, ob- 



