142 Howe: CHINESE MARINE ALGAE 
(cyst.), in shaded rock pools at low-tide mark. Like Japa- 
nese specimens currently referred to G. filicina (e. g., Okam. 
Alg. Jap. Exsicc. 32), Cowdry’s plants are somewhat softer 
and more gelatinous and rather more inclined to be hollow 
than Mediterranean plants that are held to be typical of the 
species. 
GRATELOUPIA FILICINA porracea (Mert.) 
Grateloupia porracea (Mert.) Kiitz. Phyc. Gen. 397. 1843; 
Tab. Phyc.17: pl. 25. f. a-—c. 1867. 
Grateloupia tubulosa Okam. MS. in herb. Cowdry. C, 537, 
p.p., in rock pools. This evidently intergrades with the 
preceding and also with the following. 
GRATELOUPIA FILICINA Lomentaria var. nov. 
Thallus terete or subterete, coriaceous or subcoriaceous, 
en- 
ctipecid. fusiform, or much elongated, obtuse or — 
the tetrasporic less branched and subspinescent, the tet 
sporangial ype eaenneny saeaen mostly 0.7 pe - 
( , FIGURES 2-4; P 2. 
East Cliff, saa a of Pei- ae ho, ae 302 (type, cysto- 
carpic) Sept. 25, 1919; also at Pei-tai-ho, A. de C. Sowerby 04 
(cyst.), Aug., 1921; and at Chefoo, Cowdry 537, p.p. (tetr.) 
538, p.p. (cyst.) Aug. 2, 1920 and 966 p.p. (tetr.) 
The above variety differs so much in habit from the ordi- 
nary solid flattened pinnate representatives of the extremely 
variable Grateloupia filicina that its true affinities eluded the 
writer on the first examination. The hollow thallus, the fre- 
quently ovoid or ellipsoid branchlets very strongly constric- 
ted at the base and with occasional constrictions elsewhere 
suggested relationship with Lomentaria of the Rhodymeni- 
aceae, from which family, however, the deeply immersed 
cystocarps and the more obviously filamentous cortex 
seemed to exclude it. The first impulse to describe the rigid 
Pei-tai-ho plant as a new species or even as the type of a new 
genus was counteracted by the discovery of its relationship 
to the terete or subterete hollow-thallused West Indian plant 
originally described as Grateloupia porracea (Mert.) Kiitz. and 
now currently considered to be a form of Grateloupia filicina, 
