104 THE VOYAGE OF H.M.S. CHALLENGER 



with plumose foliage on stems less than half an inch high ; but they are insufficient to 

 afford any character. 



Bryum argenteum, Linn. 



Bryumargenteum, Linn., Sp. PL, ed. 2, p. 1586 ; C. Miill., Synop. Muse. Frond., i. p. 314 (,3 lanatum) ; 

 Melliss, St HeL, p. 362. 



St Helena. 



Generally diffused. 



Two other species of Bryum exist in St Helena, but the specimens are insufficient 

 for determination. One is near to the Brazilian Bryum riyidum, and the other may be 

 one of the forms of the common Bryum dichotomum. 



Hookeria (Omaliadelphus) pallidifolia, Mitt. 



Hoolceria (Omaliadelphus) pallidifolia, Mitt, in Melliss's St HeL, p. 362. 



St Helena.— Endemic. Amongst the grass on the hisrh land — Hooker; Melliss. 



Sematophyllum (Rhaphidorrhynchum) helenicum, Mitt. 



Sematqphyllum (Rhaphidorrhynchum) helenicum, Mitt, in Melliss's St HeL, p. 363. 



St Helena. — Endemic. On bark— Melliss. 



Sematophyllum (Rhaphidorrhynchum) plumularium, Mitt. 



Sematophyllum (RhaphidorrJiynchum) plumularium, Mitt, in Melliss's St HeL, p. 364. 

 Hypnum (Sematophyllum) erythrocaulon, J. Angstr. in Hedwigia, 1875, p. 92?. 



St Helena. — Endemic. On bark — Melliss. 



Pleurozium splendens, Hedwig. 



Pleurozium splendens, Hedwig, Sp. Muse, p. 262, t. 67 (Hypnum) ; C. Mull., Synop. Muse. Frond, 

 ii. p. 457; Melliss, St HeL, p. 364. 



St Helena. — Indigenous ? 



Only collected in the island by Sir J. D. Hooker. 



Generally diffused in the north temperate zone, and extending southward to the 

 Canaries, &c. 



Hypnum (Argyrodinum) purum, Linn. 



Hypnum (Argyrodinum) purum, Linn., Sp. PL, ed. 2, p. 1594; C. Mull., Synop. Muse. Frond., ii. 

 p. 379 ; Melliss, St HeL, p. 364. 



St Helena. — Indigenous 1 Among grass on the high land at Rock Cottage, &c. — 

 Melliss. 



Europe ; North America. 



