MR. E. M. HOLMES ON MARINE ALGÆ FROM JAPAN. 255 
This species agrees with the description of Mr. Hariot's 
Gigartina prolifera, but the structure of the frond is that of 
Grateloupia rather than Gigartina. 
It appears to be variable in form, the lower portion consisting 
of branches only 1~2 lines in width, but the upper portion forms 
long strap-shaped segments 4-6 inches long and about 4 inch wide. 
GRATELOUPIA IMBRICATA, n. sp. (Pl. VIII. figs. 2a, 20.); 
fronde stipitatá, compresso-planá, dichotomo-flabellatá, segmentis 
late cuneatis, apice sinuato-lobatis, lobis divarieatis crenatis, 
eximie nitente, gelatinoso-cartilagineá, charts; non adhærente ; 
colore coccineo-purpureo. 
Hab. Shimoda, Saida, no. 46. 
This species belongs to the section Chondrophyllum, resembling 
G. Cosentinii in its shining surface and reddish-purple colour. 
The branches are crowded as in Rhodophyllis bifida, the broad 
form of which it somewhat resembles. If not pruned before 
mounting, the branches overlap each other, so that it is impossible 
to show their outline; hence the name imbricata. 
GRATELOUPIA OHKUBOANA, n. sp. (Pl. XI. figs. la, lb); 
fronde compresso-planá, a stipite brevissimá cuneatim dilatata, 
dichotomá et subpalmata, apice prolifera, segmentis oblongo- 
lanceolatis ; filis interioribus laxe reticulatis ; sphwrosporis 
cruciatis, strato corticali immersis; colore coccineo- purpur- 
ascente. 
Hab. Enoshima, Ohkubo, no. 7. 
This handsome plant presents a considerable resemblance in 
form and colour to Rhodymenia palmata, Grev., but has a 
softer and more tender substance, which is easily torn, although 
more fleshy than in that plant. It apparently reaches a foot or 
more in length, and the principal segments are about 4-5 inches 
long and about 1 inch broad. It adheres strongly to paper. 
GYMNOGONGRUS DIVARICATUS, n. sp. (Pl. VII. figs. 3 a, 35) ; 
fronde carnoso-coriaceá, compressa, dichotomo - fastigiata, seg- 
mentis anguste linearibus eximie divaricatis e ramis inferioribus 
dense secundatim proliferis ; colore roseo-purpureo. 
Hab. Shimoda, Saida, no. 61 a. 
This plant is remarkable for being divaricate throughout all 
its branches, and is yet so fastigiate as to form almost a circle 
when spread out on paper. The fronds are about 3 of a line in 
width, but are attenuated to half a line in the upper branches. 
