FLORA OF THE GALAPAGOS ISLANDS. 99 



OCHTODES, J. Ag. 



0. filiformis J. Ag. Bid. Flor. Syst., 5 (1871), Flor. Morph. PL 31, 

 p. 1-8 (1879) ; Sphaerococcus filiformis J. Ag. Spec. Alg. ii, 6G4 (1851). 

 — Wenman Isl. : Dec. 1898, Snodgrass & Heller. Further distrib. 

 West Indies. 



The occurrence of this characteristic but not common "West Indian spe- 

 cies at the Galapagos is interesting. The few specimens collected have 

 an abundance of cystocarps whose structure together with the peculiar 

 axial structure of the fronds leaves no doubt as to the genus, nor am I 

 able, even in their habit, to recognize any specific distinction between 

 West Indian and Pacific specimens. 



Peyssonnelia, Decaisne. 



P. rubra J. Ag. Spec. Alg. ii. 502 (1851). Zonaria rubra Grev. 

 Trans. Linn. Soc. xv. 340, PL III. f. 3 (1827). — Albemarle Isl. : 

 Elizabeth Bay, Snodgrass & Heller. Further distrib. Mediterranean, 

 Pacific Islands. 



Specimens with sporangia, the color altered by the preserving fluid. 



Plocamium, Lyngb. 



P. coccineum Lyngb. Tent. Hydr. 39, PL 9, B. (1819). Fucus coc- 

 cineus Huds. Fl. Angl. ed. 2, 586 (1778). — Wenman Isl., Dec. 1898, 

 Snodgrass & Heller. Distribution, general. 



Rhodymenia (Grev.) J. Ag. Emend. 



R. flabellifolia, Mont. Bonite, 105 (1844). Sphaerococcus fla- 

 bellifoUus, Bory, Coquille, 174, t. 17 (1829). — Albemarle Isl.: 

 Elizabeth Bay and Iguana Cove, Dec. 30, 1898, Snodgrass & Heller. 

 Further distrib. Peru, Chili. 



All the specimens from Elizabeth Bay and some of those from 

 Iguana Cove have the typical habit of this species. Some of the 

 specimens from the latter locality are more branched than the type but 

 appear to belong to the same species. 



