MARINE ALG^. 9 



"While referring to the southern species of Desmarestia, it may be worth while to 

 point out a slight error in the key to the species which Reinsch publishes in Flora, 1888, 

 pp. 189, 190. He classes D. chordalis with D. viridis as having its ultimate pinnules 

 uncorticated. He had apparently never seen D. chordalis, and he misinterpreted 

 Harvey's "apice longe nudis" (Flor. Antarct. ^art 11, p. 467) as meaning uncorticated, 

 whereas it simply means unarmed with spinules. We would point out that in D. 

 harveyana the axial hyphse are corticated to the very tips of the ultimate ramuli 

 (fig. 12). 



5. ECTOCARPUS GEMINATUS. 

 Ectoearpus geminatus Hook, et Harv., London Journal of Botany IV. (1845) p. 251. 



Cape Adare, with plurilocular sporangia, epiphytic on Desmarestia harveyana. 



Greogr. Distr. — Cape Horn, Falkland Islands, Kerguelen. 



This species is well figured by Hariot in Mission Scientifique du Cap Horn 

 (1882-3), tom. v. 1889, Algae, pi. 3, figs. 1, 2. Our attention has been called by Dr. 

 Carl Skottsberg to Reinke's note in the Atlas Deutscher Meeresalgen II. 1892, p. 46, 

 where he proposes to transfer this species to the genus Isthmoplea. 



FLORIDE^. 



6. iRIDiEA MIOANS. 

 Iridcea micans Bory, Voyage Coquille, 1828, p. 110, tt. 13, 13"'. 



McMurdo Strait, upon the ice of Bay between Black and White Islands, among a 

 heap of sandy matter, a mile north of rock-debris heaps, five miles north of tide-crack 

 at head of bay, September 14, 1902. 



Geogr. Distr. — Falkland Islands, Cape Horn, Valparaiso, Auckland Islands. 



A fruiting specimen, weathered, faded and fragmentary. 



7. Gracilaria sp. 



Off" Cape Wadsworth, Coulman Island. 



A fragment without fruit. The habit is that of G. multipartita, and a transverse 

 section of the thallus shows the large thick-walled inner cells, surrounded by smaller 

 ones. 



8. Gracilaria simplex. 



G. simplex, Gepp, Journal of Botany, 1905, p. 195. 

 L^tosarea simplex nob. op. cit. 1905, pp. 108, 162. 



Frondes plures (8-10) e callo minuto ortse simplices oblongse vel lato-cuneatse 

 planse membranacse, 10-15 cm. longse (apice destructo), 3-8 cm. latse, c. 230/i. 



VOL. III. 2 M 



