250 MR. E. M. HOLMES ON MARINE ALGÆ FROM JAPAN. 
paucis (3-7), articulis primariis 6-8plo, ramulorum 4-6plo 
diametro longioribus. 
Hab. Enoshima, Ohkubo, no. 31. 
This fine species receives its name from its discoverer, who 
has added several other interesting species to the Japanese flora, 
although this is, I believe, his first attempt to investigate the 
marine Alge of his neighbourhood. The plant is of a deep, but 
not dark green colour, resembling that of C. diffusa; but the 
branches are very erect, alternately dichotomous, or occasionally 
trichotomous, but not fastigiate nor even corymbose, the ramuli 
being of unequal length. It is about 3-4 inches high. It is 
nearly allied to C. rugulosa and C. hospita, but differs from the 
former in having no annular development at the base of the 
branches, and from the latter in its smaller stature and in the 
greater diameter of the cells and their more uniform length, even 
the basal cell not exceeding in length the diameter by more than 
10 times. 
Coptum CYLINDRICUM, n. sp. (Pl. VIT. figs. 1a, 15.) ; fronde 
cylindraceá, simplici, ad 8 pollices longa, et semiunciam lata, 
granulosá; utriculis clavatis apice rotundatis, diametro quad- 
ruplo sextuplove longioribus ; colore pallido-viridi. 
Hab. Misaki, Saida, no. 86. 
This remarkable plant belongs to the same section as C. ga- 
leatum and C. mammillosum, in which the utricles are sufficiently 
large to give a granular appearance to the frond, each being 
perceptible under a good lens. It is presumed to have a cylin- 
drical form when growing, from the depressed centre of the frond 
when dried. 
CopiUM DIVARICATUM, n. sp. (Pl. VII. figs. 2a, 2 2) ; fronde 
repetiter dichotomá, axillis rotundatis, sub axillis cuneato-dilatatá, 
apicibus divaricatis, ad pollices quatuor longa, 1-2 lineas lata; 
utrieulis cylindraceis apice dilatatis rotundatis, diametro bis 
terve longioribus ; colore saturate viridi. 
Hab. Shimoda, Saida, no. 39. 
This species bears an external resemblance to small forms of 
C. elongatum, C. Ag.; but in that species the utricles are 5-6 
times longer than broad, and the apices are rarely, if ever, 
divaricate. 
LETTERSTEDTIA JAPONICA, n. sp. (Pl. VII. figs 3a, 35,30); 
fronde flabellato-expansà, ad 2 pollices longâ, profunde laciniatâ, 
