FROM THE WEST INDIES. 825 
longitudinem dimidiam proxime equantia; segmenta ultima bi- 
cellularia, longitudine admodum inequalia, cellule superiores acute 
‘09-14 mm. long, ad basin 027—036 mm. late. Fructus solitarius 
ovoideus, sed paulo complanatus, ‘44 mm. longus, :31 mm. latus, in 
divisione ramulorum secunda et nonnunquam tertiá (rarius prima) 
sit. Oospora :28 mm. longa, crassitudine maxima :283—24 mm., 
minimà *18 mm., 6-striata, liris prominentibus, membrana fortiter 
reticulata. Coronula minuta. Antheridia in divisione ramu- 
lorum secundá et nonnunquam tertiá sita, diametro ‘27-30 mm.— 
(Plate 19.) 
Antigua, about half a mile from the Port, near the hospital, 
18th January, 1895. 
This species is nearest allied to N. oligospira, Braun, but it 
never has the ultimate rays regularly shortened as in the Poly- 
glochin group, having only occasionally one shortened as in some 
of the Mucronate. In ‘ Hedwigia,’ 1888, p. 94, Dr. Nordstedt 
refers to a form of N. oligospira from Porto Rico, in which the 
shortened segment is rare, and this may possibly belong to our 
species, but we have not seen specimens. 
4. NITELLA ACUMINATA, Braun, var. SUBGLOMERATA, Braun.’ 
In a clay ditch, Perseverance Estate, Cedros, Trinidad, January 
1895. 
N. acuminata is a very widely-distributed species, occurring 
also in North Africa, the Western African Isles, Southern Asia, 
Japan, in the United States (principally in the southern part), in 
Mexico, British Guiana and Brazil. The var. subglomerata has 
lts headquarters in Tropical America, but reaches as far north as 
New York. 
5. N. cernva, Braun. 
In the hard clay bottom of a shallow ditch, Antigua (with no. 2), 
18th January, 1895. 
A young state from 4 to 6 inches high, producing but two 
or three whorls, but with small fruiting branches. This species 
Was first found by Gollmer at Caracas in Venezuela, and has 
ance been recorded from Porto Rico (Sintenis) and Fernando de 
Noronha (H, yy, Ridley, 1887). 
2c2 
