140 Howe: CHINESE MARINE ALGAE 
older parts; tetrasporangia in sori at the bottom of orbicular, 
oval, or elliptic pits 75-300 wide or long, and also scattered. 
(PLATE I, FIGURE I.) 
In rock pools, Chefoo, July 29, 1920, N. H. Cowdry 556, 
p.p. in herb. Cowdry. 
Lomentaria sinensis is allied to the type of the genus, the 
European L. articulata (Huds.) Lyngb., and to the Japanese 
L. catenata Harv., but manifestly differs from both in the 
smaller size of the plants, in the more bifarious branching, 
in the lack of a catenate or moniliform appearance owing to 
the rarity of constrictions except at the bases of lateral 
branches, and in the large superficial cells, which have 2-5 
times the diameter of corresponding cells of L. articulata and 
twice the diameter of those of L. cafenata. In general con- 
sistency, the plant is more gelatinous and less cartilaginous 
than L. catenata. The pits which form ostioles for the 
tetrasporic sori are more highly specialized and more obvious 
than in L. articulata, but less so than in L. catenata. 
LAURENCIA OBTUSA (Huds.) Lamour. P, 289; C, 539. Referred 
to genus only by Okamura (in Cowdry’s list) but Collins has 
identified similar plants from Pei-tai-ho with this widely dis- 
tributed species. Tetrasporic plants under no. 539 have 
sporangiophores that are more corrugated and more con- 
stricted at the base than in West Indian plants that are 
currently referred to this species. 
CHONDRIA sp. P, 299, with incipient tetrasporangia. Near C. 
tenuissima (Good. & Woodw.) Ag. 
POLYSIPHONIA JAPONICA Harv. P, 300 and a specimen without 
number (Sept. 4, 1919); C, 967 (on Zostera) and 968 (on 
Chorda) ; and perhaps also C, 555, on rocks at low tide. Re- 
sembles in habit some of the West Indian plants currently 
referred to P. ferulacea Suhr, but the segments are often rela- 
tively longer, the sporangial branchlets are often more pod- 
like or stichidioid, the main axis is corticated at. the base, 
and there are often traces of cortication on the principal 
branches in the form of narrow inconspicuous cells alter- 
nating with the primary siphons. This species is omitted in 
J. Agardh’s “Species” and in De-Toni’s ‘‘Sylloge.”” A plant 
from Wei-hai-wei has been referred to this species by Mrs. 
Gepp (1904), who publishes a copy of Harvey’s description. 
