54 Proceedings of the llogal Irish Academy. 



Odonthalia dentata Lyngb., and Ptilota plurnosa Ag., two northern species 

 found on the coasts of Greenland and Iceland, occur on the coast of Ulster, 

 but are entirely absent from the southern half of Ireland. 



Alaria esculenta Grev., though common on the north and west coasts 

 of Ireland, is much more limited in its distribution on the east side. 

 There does not seem to be any record of its occurrence between Dundalk 

 and "Wexford. 



As regards distribution in depth, it is noteworthy that Dickie found 

 Phyllophora Brodicei J. Ag., and Delesseria ruhens (Huds.), at a depth of 

 80 fathoms off the Maiden Kocks, County Antrim. 



BIBLIOGEAPHY. 



The more important books and papers dealing with Irish Algce will 

 be found in the subjoined list. Short notes are not separately indicated, 

 but will be found scattered through the pages of the periodicals mentioned 

 below. In what follows the names are arranged in alphabetical order. 

 Where several papers are attributed to the same author, a chronological 

 sequence has been adopted : — 



Adams, J. — Chantransia Alarite Jonss. in the British Isles. Journ. of Bot., 

 Nov., 1904. 



The Seaweeds of the Antrim Coast. Ulster Fisheries and Biology 



Association Eeport for 1906. 



Allman, G. J. — On a new genus of Algas belonging to the family of the 

 Nostochinese. Ann. and Mag. Nat. Hist., vol. xi., 1843. 



[Paper on Irish Freshwater Algse without a title.] Proc. Roy, Ir. 



Acad., vol. iii., 1845. 



On an undescribed Alga allied to Coleocha^te scutata. Brit. Assoc. 



Eeport, 1846. 



Annals of ISTatueal Histoky, vols, i.-v., 1838-40. 

 Annals and Magazine of Natueal Histoey, 1841-1886. 



Akchee, W. — List of Desmidiacea3 found in the Neighbourhood of Dublin. 



Nat. Hist. Eeview, 1857. 

 — Supplementary Catalogue of Desmidiacete found in the Neighbourhood 



of Dublin. Nat. Hist. Eeview, 1858. 



Description of two new species of Staurastrum (Meyen). Proc. Nat. 



Hist. Society of Dublin, vol. ii., 1860. 



