COLLECTED DURING THE ' CHALLENGER' EXPEDITION. . 65 



Pallavicinius procumbens (Tayl.). 



Barren stems of some species, probably this, are creeping 

 amongst Bryum megalacrion. 



Anthocebos LiEVis, Linn. 

 With fruit. 



ASTERELLA HEMISPH^ERICA, BeaUV. 



With imperfect fruit. 



Marchantia polymorpha, Linn. 

 Without fruit. 



Inaccessible Island. 



Physcomitrium (Aphanorhegma) brevisetum, Mitt. 



Caulis innovationibus repetitis dichotome ramosus. Folia superiora 

 obovato-oblonga acuta brevissime apiculatave, nervo ante apicem 

 evanido, margine versus apicem serrulata, cellulis hexagono-oblongis 

 versus folii apicem brevioribus areolata. Theca in pedunculo brevi 

 globoso-pyriformis ore truncato magno, operculo perfecte conico. 

 Calyptra longirostris basi plurifida laciniis ad operculi basin descen- 



dentibus. 

 On earth. 

 Caulis \-\\ unciam altus. Folia 1^-2-linearia satis firma viridia. Pe- 



dunculus semilineam longus. 



Differs from its congeners in the large exactly conical oper- 

 culum. 



Bryum truncorum, Brid. 



Barren. 



Kerguelen's Island. 



Cynontodium australe, Mitt. Muse Austr . Amer . 42. 



In the descriptions of this species it is omitted that when dry 

 each leaf is spirally twisted. 



Blindia mickocarpa, Mitt. 



Monoica. Pulvinate cscspitosa. Caulis dichotomus fastigiatim ramo- 

 sus. Folia patentia stricta plus minus falcato-curvatave dimidio infe- 

 riore lanceolato superiore carinato anguste attenuato integerrima nervo 

 angusto percursa cellulis alaribus in auriculam parvam dispositis 

 fuscis reliquis elongatis angustis; perichsetialia brevia parva ovata 

 convoluta in acumen subulatum producta. Theca in pedunculo gra- 

 cili foliis caulinis dimidio breviore erecta parva ovali*, operculo subu- 

 late demum ore dilatato cyathiformis fusca, peristoma dentibus tene- 



