-67- 



Bryum algens Card. Two of the numbers, 449 and 453, no doubt belong 

 here, the former being a starved form. Both were sterile. 

 Bryum crateris Dixon sp. nov. 



§Indinatiformia. B. imperfecto Card, antarctico paullo, nec arete affine. 

 Dense caespitosum, laete viride, vix nitidum, infra fuscum., circa 2cm. altum, 

 gracile. Folia caulina saepius comata, innovationum autem magis aequaliter 

 inserta; sicca erecta, adpressa, niillo modo contorta; comalia 2-2.5 rniri. longa, 

 ovato-lanceolata, sensim acuminata, marginibus valde recurvis, integerrimis, 

 anguste haud distincte limbatis. Costa sat valida, saepe rubella, in cuspidem 

 validiusculum acutum integrum excurrens. Areolatio leptodermica, e cellulis 

 inanibus, pellucidis, hexagono-rhomboideis, circa 60 ^. longis 12-15 \L. latis, 

 instructa. 



Synoicum; antheridia, ut videtur, pauca. Theca vix exserta. Seta per- 

 brevis, circa i cm. longa, supra flexuosa, saepe cygneo-decurva, tenuis. Theca 

 circa 3 mm, longa, e collo bene distincto turgide pyriformis, pallide fusco-stra- 

 minea; operculum conico-apiculatum. Exothecii rete valde leptodermicum, e 

 cellulis irregulariter hexagono-rectangularibus, orificium versus parum minor- 

 ibus instructum. Spori 18-28 [k, saturate virides. Peristomium variabile; 

 externi dentes aurantiaci vel pallidi, inter se remotiusculi, inferne anguste hya- 

 line marginati tenuissime striolati, striolis nunc horizontaliter, nunc longitudi- 

 naliter, nunc oblique ordinatis; linea media irregularis, lamellae remotae, paucae, 

 tenerae. lamellae internae circa 10-12, valde prominentes; dentium apices hyal- 

 inae, laeves. Peristomium internum e membrana pallida humili processubus 

 dentibus aequilongis plerumque tenuissimis per totam longitudinem fere valde 

 fenestratis. Cilia nulla. 



Nos. 451; 452; the latter sterile. . 



Species propria, B. imperfecto Card, forsan affine, sed foliis multo angust- 

 ioribus, atque structura peristomii longe aliena 



The processes vary considerably, being usually extremely delicate and fili- 

 form; at times they are rimose to the base. 



Polytrichum alpinum L. Nos. 455, 456. Sterile. 



Polytrichum subpiliferum Card. No. 454. 



Fragments only found, hence not showing the white tomentum at base of 

 stems but it agrees in other respects. The short hair-point, reddish below, white 

 above, and the smooth back of the leaf, are the principal characters separating 

 it from P. piliferum. 



Brachythecium SkoUshergii Card. No. 446. This seems undoubtedly to 

 agree with the description and figures. B. antarcticum var. cavifohum Card, 

 differs in the more concave, less plicate leaves, and wider acumen, but the two 

 must be very near one another. 



Mosses from South Georgia 



The followmg list of mosses is drawn up from a collection sent me by Rev. 

 D. Lillie also received by him from Mr. J. Hamilton, in 1919. The name of the 



