FLORA OF THE GALAPAGOS ISLANDS. 95 
as defined by Falkenberg, but there is a free cell between those from 
which the divisions of the ramelli arise. With this exception, the plan 
of ramification follows the type shown in Falkenberg, fig. 10, A. The 
divisions of the ramelli are not divergent but penicillate with a tendency 
to be slightly convergent. The older stichidia are very long and the 
consecutive series of sporidia are often as many as 20 and sometimes 
more, showing 3-4 sporangia on side view. The branches are radial and 
not dorsiventral, although in drying they have the appearance of being 
flattened in the upper part. In section of the larger branches it was not 
possible to recognize any definite axial or pericentral cells in the material 
examined, but they had probably collapsed in the preparation. 
Ditsea, Stack. 
D. sp. — ALBEMARLE Ist.: Iguana Cove, Dec. 30, 1898, Snod- 
grass & Heller. 
A single imperfect specimen with sporangia; the material insufficient 
for specific determination. 
GaLaxaura, Lamx. 
G. Marcinata, Lamx. Hist. Polyp. Flex. 264 (1816). Corallina 
marginata, Ell. & Sol. 122, t. 22, f. 6 (1786). Brachycladia, Sonder 
et Auct.— ALBemarRLe Ist.: Iguana Cove, Snodgrass & Heller. 
Further distrib. tropical seas. 
Ge.ipium, Lamx. 
G. crinae, J. Ag. Epicr. 546 (1876). Fucus crinalis, Turn. Hist. 
Fuc. Pl. 198 (1819). Gelidium corneum, var. crinale, Auct.; Piccone 
2) 39.—Cuartes Isu.: Marcacci, acc. to Piccone, l.c. Further 
distrib. general. 
Several specimens of a Gelidium were collected at Wenman Isl. 
with well-developed bilateral conceptacles characteristic of the genus. 
Ore would have expected from this locality rather G. jilicinum, Bory, 
Coquille, 162 (1829), than G. serrulatum since the former species was 
first described from Chili, whereas the latter is an Atlantic species. I 
have been able to compare the Wenman Isl. specimens with an authentic 
specimen of G. filicinwm from herb. Bory through the kindness of 
