172 THE VOYAGE OF H.M.S. CHALLEXGER. 



Campylopus introflexus, Mitt. 



Campylopus introflexus, Mitt., Muse. Austr. Am. in Journ. Linn. Soc. Lond., xii. p. 84. 

 Dicranum introflexum, Hedw., Sp. Muse, p. 147, t. 29. 



Tristan da Cunha. Mosclcy. 



The fertile specimens are very small and short stemmed ; the species is exceedingly 

 variable both in size and colour. 



This species abounds throughout the southern hemisphere, and in Europe it extends as 

 far north as the south coast of Britain, and in America as far as Alabama. 



Campylopus arcuatus, Mitt. 



Campylopus arcuatus, Mitt, in Journ. Linn. Soc. Lond., xv. p. Gl. 



Dicranum arcuatum, Brid., Bryol. Univ., i. p. 463; C. Mull., Synop. Muse. Frond., i. p. 388. 



Tristan da Cunha. — Barren stems intermixed with a tall state of Campylopus 

 introflexus — Moseley. 



Campylopus vesticaulis, Mitt. 



Campylopus vesticaulis, Mitt, in Melliss's St Helena, p. 357. 



Tristan da Cunha. — Endemic. Collected in plenty by MacGillivray and Milne. 

 It is allied to the preceding, but differs in its leaves. 



Ceratodon purpureus, Brid. 



Ceratodon purpureus, Brid., Bryol. Univ., i. p. 480; C. Mull., Synop. Muse. Frond., i. p. 646. 

 Milium purpureum, Linn., Sp. PL, 1575. 



Tristan da Cdnha. — A few fertile stems growing with Marchantia polymorpha. 

 Moseley. 



A cosmopolitan moss. 



Grimmia (Dryptodon) membranacea, Mitt. 



Grimmia {Dryptodon) membranacea, Mitt, in Journ. Linn. Soc. Lond., xv. p. 61. 



Tristan da Cunha. — Endemic. On rocks — Moseley. 



This moss is closely related to the Grimmia symphyodon, C. Muller, and although it 

 differs a little in the apices of its leaves, it may be but one form of a widely distributed 

 austral species. 



Hymenostylium (Gymnostomum) calcareum, Nees et Hornsch. 

 Gymnostomum calcareum, Nees et Hornsch., Bry. Germ., i. p. 10. 



Tristan da Cunha. — A few barren stems intermixed with Bryum tnegalacrion. 

 Moseley. 



It is probably a cosmopolitan species. 



