96 PROCEEDINGS OF THE AMERICAN ACADEMY. 
Dr. E. Bornet and with an authentic specimen of G. serrulatum from 
herb. Agardh. It seems to me that there can be no doubt that they 
agree perfectly with G. serrulatum and differ from G. filicinum although 
the two species are certainly closely related. 
G. Fiticinum, Bory, Coquille, 162 (1829).— ALpemarLeE Ist. : 
Iguana Cove, Dec. 30, 1898, Snodgrass & Heller. Further distrib. 
west coast of South America. 
But a single specimen was found which may be referred to this 
species. 
GIGARTINA, Stackh. 
G. Lessonn, J. Ag. Spec. Alg. ii. 268 (1851). Sphaerococcus 
Lessonii, Bory, Coquille, 171 (1829), excl. syn. — ALBEMARLE ISL.: 
Elizabeth Bay and Iguana Cove, Feb. 1899, Snodgrass & Heller. 
Further distrib. Peru, Chili. 
Most of the specimens were small and sterile, but one had con- 
ceptacles which in this species are borne at the base of small branchlets 
rather than in well-marked papillae as in most species of the genus. 
GRACILARIA, Grev. 
?G. rugutosa, Mont. Pole Sud, 155, Pl. 13, fig. 1 (1845) sub 
Hypnea. — Avsemarte Ist.: Iguana Cove. Snodgrass & Heller. 
Further distrib. Australia. 
Two specimens with cruciate sporidia which agree well with the 
description and figure of the habit of this species. Montagne’s figure 
shows sporidia which certainly are not zonate as in Hypnea, but may 
be tripartite, although the figure is not quite clear on that point. The 
Galapagos alga has cruciate sporidia and hence, in spite of its habit, can 
be referred only with doubt to Montagne’s species. 
GymnoGoneres, Mart. 
G. GRIFFITHSIAR, var. GALAPAGENSIS, Picc. & Grun. in Piccone (1); 
60, & (2), 31.—CuarRLes and Cuatuam Ips.: Marcacci, ace. to 
Piccone, ll. ce. Endemic. 
G. MELANoTHRIX, Grunow in Piccone (1), 60, & (2),31. Gigartina 
melanothrix, Bory, Coquille, 152, t. 19, f, 3 (1829.) — CHARLES and 
Cuatuam Ips.: Marcacci, acc. to Piccone, ll. cc. Further distrib. 
Chili. 
G. VERMICULARIS, J. Ag. Spec. Alg. ii. 323 (1851.) Fucus ver 
micularis, Turn. Hist. Fuc. Pl. 221 (1819); Piccone (1), 61.— 
