138 HoweE: CHINESE MARINE ALGAE 
inconspicuous leaves and receptacles. In another specimen, 
524, from the same locality, the leaves and receptacles are 
less numerous 
The no. as is the Sargassum fuliginosum (?) of the 
Cowdry list. Yendo makes S. microceratium a synonym of 
S. piluliferum (Turn.) Ag., but Turner’s original plates of 
the two look very different and our Chefoo plant is nearer the 
S. microceratium. Sargassum piluliferum has large com- 
pound dichotomous leaves; the Chefoo specimens have very 
small simple leaves. 
DICTYOTA DIVARICATA Lamour. C, 548, in rock pools. 
DictyorTa INDICA Sond. With the preceding and under the same 
number. The two species or forms apparently intergrade, 
as also in the West Indies. D. indica has been reported 
from Pei-tai-ho by Collins and D. divaricata appears in the 
Cowdry list, based on determinations by Okamura. 
Neurocarpus divaricatus (Okam.) comb. nov. Haliseris divari- 
cata Okam. Ic. Jap. Alg.1: 57. pl. 13, 14. 1907. C, 549, 
in rock pools. Apparently seen and named by Okamura. 
RHODOPHYCEAE 
GELIDIUM CORNEUM (Huds.) Lamour. In rock pools, P, 296; C, 
540, 541, 544, and 554. Nos. 540 and 544 are slender bi- ~ 
tripinnate fotms of this notoriously variable species, resem- 
bling Turner’s varieties pulcheilum and claviferum; these 
formed the basis of the Gelidium Amansii of the Cowdry list. 
Nos. 296 and 544 are taller, less densely and rather less regu- 
larly branched plants, somewhat resembling Lamouroux’s 
figure of his Fucus Amansii (from Mauritius and Madagas- 
car) and resembling also some of the Australian plants dis- 
tributed by J. Agardh as his Gelidium australe; no. 554 ap- 
pears to be the “ Gelidium Amansii Lmx., f. radicans Okam. 
mscr.’”’ of the Cowdry list. No. 541 is more regularly bipin- 
nate with more clavate, more obtuse branchlets; this is ap- 
parently the Pterocladia capillacea of the Cowdry list, but 
the specimens are sterile or tetrasporic and we find no reason 
for believing them to belong to Pterocladia rather than to 
Gelidium. A Pei-tai-ho form similar to no. 544 from Chefoo 
is the Gelidium australe of the Collins list. 
