ON THE FORMS OF HALIMEDA FROM FUNAFUTI. 479 
On the Forms, with a New Species, of Halimeda from Funafuti. 
By ErnELS. Barkow. (Communicated by GEORGE Murray, 
F.R.S., F.L.S.) 
[Read 3rd May, 1900.] 
(Prate 18.) 
THE following is a short account of the specimens of Halimeda 
colleeted at Funafuti by the Coral-boring Expedition under Prof. 
Edgeworth David in 1897. The list includes one new species, 
and a new variety of H. cuneata, Kuetz., which may also prove to 
be a new species; the other records, with the exception of H. 
macroloba, Decne., and H. Tuna, Lamour, are of species already 
recorded from the Fiji and Friendly Islands by Dr. Askenasy 
in the * Voyage of S.M.S. Gazelle, Theil iv., Bot. Algen, 1888, 
pp. 18 & 14. H. macroloba, Decne., is recorded by other collectors 
from the Pacific Islands. The numbers given are those of the 
collection sent home by Prof. David, and now preserved in the 
British Museum. Their retention in this list may be useful for 
future reference. 
A. 21. HALIMEDA Tuna, Lamour. A. fragment only. 
H. Opuntia, Lam., var. MACROPUS, Ask. 
From 45 fathoms, Funamanu. 
A. 31. HALIMEDA LANA, n. sp. (Pl. 18. figs. 1-3.) 
Ad 40 em. longa sed imperfecta, e pallido albescens, superne 
quam inferne omnino minus incrustata, articulo supremo vix 
incrustato ; sparse et vage ramosa, ramis nunc uno, nunc duobus 
oppositis, sepe distantibus. Articuli simplices subcylindrici, 
cirea 9 mm. longi (interdum 4 mm.), 2 mm. lati, 1:5-2 mm. crassi ; 
articuli ramigeri superne 5 mm., inferne 2 mm. lati; utriculis 
corticalibus 50 u longis, circa 33 u diam., parietibus 7 p crassis, 
bilamellatis, angulis incrassatis. 
This plant may be distinguished from all other known species 
of Halimeda by its long straggling habit, few branches, and by 
the thick wall between the peripheral cells in all but the young 
joints. It differs from other species with cylindrical joints in 
the size of its peripheral cells, those of H. polydactylis, J. Ag., 
being 25 p across, and those of H. cylindracea, Decne., being 50 p, 
while H. laxa is 33 u. Neither of these plants shows the thick 
LINN. JOURN.—BOTANY, VOL. XXXIV. 20 
