170 · GRATELOUPIACEAE 
lobes have a linear-lanceolate marginal proliferation towards the 
apex. Most of the segments show a decided spiral twist such аз 
is often exhibited by species of Ulva, etc., when they grow іп eddies 
of water. The segments are only 0.14-0.22 mm. thick. The 
cortex is rather thinner than in the specimens that we have referred 
to С. Cutleriae and С. schizophylla, the anticlinal cortical fila- 
ments being mostly only 3 or 4 cells long, while in С. Сийетае and 
С. schizophylla, they are mostly 4—6 cells long. From the Peruvian 
specimens that we are referring to G. schizophylla, G. doryophora 
differs, besides the thinner cortex, in the much smaller size of the 
plant and the thinner, twisted, lanceolate rather than linear 
segments. It is possible, however, that more extensive colles 
tions may show that the two intergrade. It is even conceivable 
that such widely different forms as Grateloupia doryophora, 
Iridaea violacea; Grateloupia Cutleriae, Grateloupia schizophylla, 
and Grateloupia Cutleriae procera may be proved to be phases of 
one polymorphous species, in which case Grateloupia doryophora 
would appear to be its legal name. 
Nothing closely corresponding to Grateloupia doryophora Was ` 
brought from Peru by Dr. Coker. 
GRATELOUPIA SPATHUT АТА J. Ag. (Sp. Alg. 2: 179. 1851), described 
from Peru without definite locality, we know from description 
and photograph only. It does not appear to occur in Dr. — 
Coker's collections. The sheet bearing the original specimen 
(no. 22671 in herb. Agardh) is inscribed “Мег du Chili & du 
Pérou.” It is therefore possible that the specimen really came 
from Chile. 
GRATELOUPIA DENTICULATA Mont. (Voy. Bonite, Bot. Crypt. 65. pl. 
145. f. 1. 1846) is apparently known only from the original 
material collected at Paita, Peru, in July 1836, by Gaudichaud. 
Three authentic specimens of this, one of them under an un 
published manuscript specific name, another the Species 
figured by Montagne, are preserved in the Muséum d'Histoire. 
Naturelle of Paris. The largest of these, asit lies on the per 
has an extreme length of about 16 cm. and its widely spreading 
branches have a span of about 25 cm. The thallus is thick 
(0.65-0.75 mm.) and coriaceous ог cartilaginous; the cuneate 
