HowE: CHINESE MARINE ALGAE 143 
and furthermore by seeing later Cowdry’s collections made 
at Chefoo, which appeared to show all gradations between 
the rigid mostly short-branched plant here described as 
G. filicina Lomentaria and a laxer more gelatinous longer- 
branched plant close to the typical G. porracea (Grateloupia 
tubulosa Okam. MS. in herb. Cowdry). The last-mentioned 
forms, on the other hand, intergrade at Chefoo with flattened 
pinnate forms which may be compared without violence with 
typical G. filicina. 
GRATELOUPIA sp. C, 532 in herb. Cowdry. A single sterile 
fragment 8 cm. long, 5-10 mm. wide, subpinnate, with lance- 
olate lobes, which are scarcely or not at all constricted at 
base. Perhaps related to the Japanese Grateloupia acu- 
minata Holmes. In herb. Cowdry the specimen was named 
Nemastoma. 
Nemastoma Cowdryi sp.nov. Thallus lubricous, moderately ge- 
latinous, subcorneous on drying, deep parplish. vinaceous, In- 
dian lake, or dahlia carmine, repeate edly (mostly 7-12 times) 
and rather regularly dichotomous, ele icoroniste 
4-10 cm. high, the more eaaly divided somewhat sieeve 
of Ceramium rubrum i it, occasionally proliferous, 
older parts and below the dichotomies, tubulose below, the 
wider parts 1-3 mm. broad, the widely sprees ne. often sub- 
aareale termine branches 150-300 yu. in diameter (not in- 
cluding mucous sheath, which is =e 150 y thick), the 
apices Yaar: medullary filaments 12-24 u in diameter; 
cortex consisting of 3-5 times closely di-(tri- )chotomous 
strictly fastigiate filaments 80-120 p long, the penicillate 
clusters rather easily separable, mae peeail cells ovoid, 
about 12-15 u in diameter, sometimes broader than high, 
the succeeding cells ellipsoid or short-cylindric, 7-9 u broad, 
the clusters usually terminating in rather rigid tapering un- 
branched filaments 2-4 cells long, their cells mostly about 3 
broad and 2 or 3 times as long, the distal cells 12-25 u long, 
commonly trichomic and often capitate; tetrasporangia 
scattered, sessile on cortical branchlets of the penultimate 
order, ellipsoid or obovoid, 30-42 w X 16-24 wv (incl. wall), the 
spores decussately paired; other parts unknown. (PLATE, 
FIGURE 5 
In shaded rock pools, Chefoo, July 14, July 29, and Aug. 
2,1920, N. H. Cowdry 534 (type) and 533 (July 10, 1920). 
Nemastoma Cowdryi is related to N. dichotomum J. Ag., 
but differs in its more delicate, more terete, more Ceramioid * 
