THE MARINK ALGM OF THE OBAN DISTRICT. 231 



Order VIII.— Sphacelariace^. 



Sphacelaria radicans, Harv. — " Sandy rocks, 

 Appin'' (Carinichael). — On sandy shore near the 

 islands in Ardchattan Bay. 



S. cirrhosa, C Ag. — ^Very common, passi7n on 

 various algae. 



Chaetopteris plumosa, Kiitz — On islands in the 

 Firth of Lorne, not uncommon. 



Cladostephus spongiosus, C. Ag. — In sandy bays 

 near North Connel. 



Halopteris filicina, Klitz. (Sphacelaria fiUcina, 

 Phyc. Brit.). — I found this species once only, on the 

 shores of Eilan Dubh, a small island opposite Lismore. 



Order IX — Mybionemace^. 



Myrionema strajigulans, Grev., var. puncti- 

 f or mis {M. punctiforme, Phyc. Brit.). — A common 

 epiphytic on Ceramiimi, etc, in Loch Etive. 



Ralfsia clavata, Crn. {Myrionema clavatum, Phyc. 

 Brit.). — " On Chrysemenia clavellosa, at Appin " (Car- 

 michael). This rare species, now identified as a 

 Ralfsia, is, according to Mr. Batters, doubtfully syn- 

 onymous with Carmichael's Linckia clavata. 



R. verrucosa, Aresch. (R. cleusta, Phj^c. Brit.). — 

 On Rocks near Dunstaft'nage, occasionally. 



Order X. — Chordariace^. 



Stilophora rhizodes, J. Ag. — Dredged in Loch 

 Etive. I only obtained a stunted fragment, with 

 sporangia however, which I identified from a 

 similarly imperfect specimen named for me by Mr. 

 Batters, and obtained at Puffin Island, Anglesea. 



Chordaria flagelliformis, C. Ag. — Exceedingly 

 common in Loch Etive, and in the Firth of Lorne. 



Mesogloea vermiculata, Le Jol.— On rocks near 

 Dunstatfnage, and on islands near Lismore. 



Leathesia diflformis, Aresch. {L. tuheriformis, 

 Phyc. Brit.). — On rocks near the Falls of Lora, rare. 



