COLLECTIONS FROM CHRISTMAS ISLAND. 861 
PoLYPODIUM IRIOIDES, Lam.—Tropies of the Old World. 
VITTARIA ELONGATA, Swartz.—Tropies of the Old World. 
ACROSTICHUM FLAGELLIFERUM, Wall.—Tropical Asia. 
ACROSTICHUM ($ GYMNOPTERIS) LISTERT, Baker, n. sp.—A. rhi- 
zomate late repente crassitie cygni penna, stipitibus sterilibus 
elongatis subnudis haud contiguis, frondibus lanceolatis mem- 
branaceis acutis basi attenuatis, venis primariis perspicuis paral- 
lelis, intermediis in areolas copiosas hexagonas anastomosantes 
venulis liberis inclusis productis, frondibus fertilibus linearibus 
stipitibus longioribus. 
A well-marked new species, allied to the Himalayan, Ceylonese, 
and Malayan A. variabile, Hook. Stipes of the sterile frond 7-8 
inches long. Sterile frond 9-12 in. long, 2 in. broad, narrowed 
gradually to the apex aud more suddenly to the base. Fertile 
frond 4-5 in. long, under 3 in. broad at the middle, narrowed 
gradually to both ends. 
LYCOPODIACE E. 
Lycoropıum PHLEGMARIA, Linn.—Tropies of the Old World. 
MUSCI. 
(By C. H. Wrieut.) 
NECKERA LEPINEANA, Mont.—Malay archipelago and Poly- 
nesia. 
THYRIDIUM FASCICULATUM, Mitt.— Malay archipelago, Poly- 
nesia, Chili. 
HEPATIC. 
Prycnantuvs SQUARROSUS, Mont.—Tasmania, Fiji. 
LEJEUNIA SERPYLLIFOLIA, Libert.—Europe, India, Socotra, 
tropical and South Africa, North and South America, and Aus- 
tralasia. 
LICHENES. 
Usnea TRICHODEA, Ach— Very widely spread in the tropics, 
and extending into some temperate regions. 
