394 FLORA VITIENSIS. 
ramosus ; folia a basi ovali erecta, recurva, patentia, subulata, sensim in acumen aristiforme sub- 
teres attenuata, dentibus aculeiformibus ad apicem aristæ minoribus brevioribusque serratis incras- 
satis; lamina folii supra basin erectam transversim rugulosa; perichætialia a basi ovali inferne enervi 
convoluta, superne in aristam thecam oblongam curvatam superantem producta, apice remote den- 
tata; operculum subulatum; peristomium dentibus pallidis angustis elongatis, internum processibus 
parum brevioribus in membrana ad å dentium longitudinis exserta impositis.— Viti (Milne!) ; Samoan 
Islands, Tutuila, and Upolu (Powell! n. 127). 
This species corresponds generally with S. Reimvardti, Nees, from the Moluceas, but its leaves are more 
*attenuated into a bristly point. 
Tab. 97. Fig. 1,a stem of the natural size; 2, leaves with portions more enlarged; 3, perichætium 
and capsule; 4, a portion of the peristome, all magnified. 
2. S. flagellosus, Schimp. Nova Acta, vol. xxxiii. t. 4; caulis superne ramosus ; rami patentes 
apice attenuati, ramulos flagelliformes attenuatos prodentes; folia caulina a basi latiora, erecta, 
patentia divergentiaque, subulata, apicibus réctis vel incurvis, siccitate semitorta curvataque ; nervo 
cum marginibus incrassatis denticulis pluribus parvis angustis serratis coalito, in acumen elongatum 
trigonum sublæve continuo, pagina inferne fasciis obscurioribus striata; folia in ramulis flagelli- 
formibus erecto-patentibus pallidioribus striata; fructus S. aristifolio simile, peristomio interno mem- 
brana basilari latiore, — Viti (Seemann ! n. 840, Wilkes) ; Aneitum (Milne !) ; Isle of Pines (Strange !). 
The erect portion of the leaf in this species is much dilated, being half as wide again when spread out 
as the patent part. The fruit is described from Dr. Schimper's figure. : 
Tab. 97. Fig. 1, stem of the natural size; 2, a leaf, with portion more enlarged, magnified. 
3. S. Balfourianus, Grev. Ann. and Mag. of Nat. Hist. 1848, t. 18; caulis superne ramis 
patentibus irregularibus subfasciculatim pinnatus; folia a basi versus insertionem angustata, erectiora, 
sensim patentia, siccitate curvata subcontorta, ambitu late ovali-lanceolata, subulato-acuminata, 
fasciis paucis angustis striata, nervo apice cum limbo coalito in acumen aristiforme producto 
dentibus marginalibus minutis brevibus usque ad apicem continuatis.— Viti (Milne !) ; Tahiti (Sibbald ! 
Collie!) ; Society Islands (Bidwill in Herb. Hooker). 
Some of the specimens very much branched above, in size and appearance nearly resembling S. flagel- 
laris, but with leaves having their erect portion not dilated, and at the base very much narrowed, and the 
patent upper part twice as wide as in that species. Schimper in his monograph of Spiridens, figures the 
leaf of S. Balfourianus with large and leafy teeth, a character in opposition to that given by Greville, who 
figures it narrower than in S. Keinwardti. 
XIII. Pterobryum, Hornsch. Rami fertiles inferne simplices, stipitiformes, superne in frondem 
pinnatam arbusculosamve ramosam divisi. Folia undique sequalia vel compressa. Тһеса immersa 
vel exserta, peristomio parvo depresso, dentibus inter se et cum peristomii interni rudimentis cohæ- 
rentibus. Calyptra parva, integra. 
The following Polynesian species have as yet not been met with in Viti, viz. :—1. Р. cylindraceum, 
Mont. Ann. des Sc. Nat. 1848, p. 109, from Pacific Islands (Beechey !) ; Samoa, Tutuila (Powell! n. 72). 2. 
P. Mauiense, Sull. Amer. Expl. Exp. p. 21. t. 19 (Meteoriwm), from Sandwich Islands, East Maui, on the 
north bank of the crater, 10,200 ft. (Amer. Exp.) ; Samoa, Tutuila (Powell !). 
1. P. Vitianum, Sull. in Proceed. of the Amer. Acad. of Arts aud Sciences, 1855 (Pilotrichum) ; 
dioicum ; rami inferne simplices, superne in frondem arbusculosam pinnatim divisi; folia nitida, 
quinquefaria, imbricata, in apicibus ramulorum in cuspidem gemmaceam congesta, late oblonga, ex- 
cavata, subito in acumen subintegerrimum inferne convolutaceum producta, enervia, cellulis angustis 
basi ad angulos paucis abbreviatis, perichætialia erecta oblonga sensim subulato-acuminata apicibus 
erecto-patentibus; theca oblonga, fere sessilis, operculo acuminato, peristomii dentibus subulatis ; 
