THE MARINE ALG^C OF THE OBAN DISTRICT. 225 



(where several rock-pools yielded a large number of 

 species), on the islands opposite Ardchattan Church, 

 at Bonawe and Achnacloich, and at the head of 

 Loch Etive. Collections were also made in Loch 

 Creran, on the shores of the Sound of Kerrara, and 

 on sofne of the islets oif Lismore (for the opportunity 

 of visiting which I have to thank Mr. T. Hopwith of 

 Kilcheran, Lismore). 



The systematic attack on the Marine Algae of the 

 Clyde Area by the Committee of which Mr. George 

 Murray, F.L.S., is Secretary, initiates, I trust, a 

 thorough exploration of our coast-line. We have 

 already Mr. E. A. L. Batters' admirable List of the 

 Marine Algce of Berioick-07i-2rveed, and Mr. Traill's 

 equally useful lists from the Firth of Forth and the 

 Orkneys ; while Mr. Batters has done good service 

 by publishing, in the Journal of Botany, a check-list 

 of the Marine Algse of the Clyde. In time we may 

 hope for a complete series of papers, embracing the 

 entire coast-line from Berwick to the Mull of 

 Gallowa5^ 



I have employed, for ease of reference, the 

 nomenclature and classification of Holmes and 

 Batters' Revised List of British Marine Algce* For 

 convenience I have added localities observed by Car- 

 michael and recoi'ded in the Phycologia Britannica. 



Class TITALLOPHYTA. 

 Sub-Class ALGiE. 

 Series l.—CYANOPHYCE^. 

 Cohort I — C H R o o c o c c I X ^. 

 Order L — Chroococcace^. 

 Gloeocapsa crepidinum, Thur.— On the piles of 

 the old pier at South Connel, aiid on wood-work 

 vinder water at Bonawe. 



Order II.— CHAMiESIPHONACEJE. 



Dermocarpa prasina, Crn. — On Pohjsiphonia 

 fastigiata and other algae, passim. 



* Annals of Botany, Vol. v.. No. xvii. 



