74 BANGIACEAE 
RHODOPHYCEAE 
Family BANGIACEAE 
PORPHYRA Ag. Syst. Alg. xxxii, 190. 1824 
Diploderma Kjellm. Kongl. Sv. Vet. Akad. Handl. 20°: 188. 1883. 
Wildemania De-Toni, Nuov. Notar. т: I43. 1890. 
PonPHYRA KuNTHIANA Kiitz. Рус. Gen. 383. 1843; 
: Tab. Phyc. то: 30. 21. 84. 1869 
Pescadores Islands, Feb. 12, 1907, Coker во р.р.; “соттоп on 
surf-washed rocks (this species is eaten)," Chincha Islands, July 13, 
1908, Coker 401; from rocks in the surf, Mollendo, August, 1908, 
Coker 565 p.p. 
Our specimens are rather small and are apparently more or less 
decolorate from the mode of preservation. Тһе thalli are nar- 
rower than those of the type as figured by Kützing. They are 
clustered or in rosettes, linear-lanceolate or oblong-lanceolate, 
6-10 cm. long and 1-2.5 cm. wide, undulate-crisped and often 
contorted. Тһе thallus varies in thickness in different parts and 
different plants from 60 to 130 и; itis monostromatic in the vegeta- 
tive parts; the surface jelly is very thick, that of the two surfaces 
together often constituting one half or even three fifths of the thick- 
ness of the thallus. Тһе plants are monoecious, the sporocarps and 
antheridia in irregular marginal patches; sterile cells, usually in 
groups, are often intermingled with the sporocarps, but not with the 
antheridia; small irregular islands of antheridia often occur among 
the sporocarps and ѕрогосагрѕ are occasionally found irregularly 
scattered among the vegetative cells. Spores 32 or the division is 
perhaps sometimes complete when 16 have been formed; anthero- 
zoids 128, or possibly 64 by imperfect division. _ 
The type of Porphyra Kunthiana, collected at Valparaiso by 
Gaudichaud, we have been able to examine through the courtesy 
of Mme. A. Weber-van Bosse, the present owner of the Kiitzing 
herbarium. The thallus of the type specimen, when soaked out 
in water, has a thickness of 80-100 и in incipiently reproductive 
parts and is here vegetatively monostromatic; the specimen is · 
monoecious and shows the general characters of sporocarps and 
antheridia described above for Dr. Coker’s specimens. 
