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. 



Dilsea, Stack. 



D. sp. — Albemarle Isl. : Iguana Cove, Dec. 80, 1898, Snod- 

 grass & Heller. 



A single imperfect specimeu with sporangia ; the material insufficient 

 for specific determination. 



Galaxaura, Lamx. 



G. marginata, Lamx. Hist. Polyp. Flex. 264 (1816). Corallina 

 marginata, Ell. & Sol. 122, t. 22, f. 6 (1786). Brachycladia, Sonder 

 et Auct. — Albemarle Isl. : Iguana Cove, Snodgrass & Heller. 

 Further distrib. tropical seas. 



Gelidium, Lamx. 



G. crinale, J. Ag. Epicr. 546 (1876). Fucus crinalis, Turn. Hist. 

 Fuc. PI. 198 (1819). Gelidium corneum, var. crinale, Auct. ; Piccone 

 (2) 39. — Charles Isl. : Marcacci, ace. to Piccone, I.e. Further 

 distrib. general. 



G. serrulatum, J. Ag. Oefv. Kongl. Vet. Akad.Forh. iv. 11 (1847). 

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

 Venezuela. 



Several specimens of a Gelidium were collected at "Wenman Isl. 

 with well-developed bilateral conceptacles characteristic of the genus. 

 One would have expected from this locality rather G. filicinum, 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. filicinum from herb. Bory through the kindness of 



