read before the Belfast Natural History Sodiety. 149 



Callith&mnion Bdrreri Ag. ? ; Conferva Borrerz Eng. Bot., t. 

 1741. ? A single specimen, apparently of this rare species, 

 as figured and described in English Botany, but wanting the 

 filaments there represented, I collected at Bangor in Sep- 

 tember, 1835. 



Mesogloia purpurea Harvey in Brit. FL, iL 386. Found 

 growing on the rocks at the island of Ireland's Eye (north 

 of Dublin Bay), by Robert Ball, Esq., during an excursion 

 we had thither in April, 1835. 



Species new to the North, or hitherto unnoticed as occurring 

 North of the County of Clare, on the Western, and of the 

 County of Dublin, on the Eastern, Side qf Ireland. 



Cystoseira granuldta Grev. Algae Brit., p. 5. t. 2. In the col- 

 lection of Dr. Drummond, to whom the species has long 

 been known, from his having on several occasions gathered 

 it at Lame (co. of Antrim). According to Dr. Drummond, 

 it attains a much greater size there than commonly described. 



JDesmarest'ia liguldta Lamour., Grev. Alga Brit., p. 37. t. 5. 

 A few specimens have been collected by Dr. Drummond at 

 Bangor, where it occurred to me not uncommonly in Sep- 

 tember and October, 1835: one specimen then obtained 

 measured, though imperfect, 10| ft. in length. 



* Sporochnus pedunculdtus Ag., Grev. Alga Brit., p. 41. t. 6. 

 A single specimen occurred to me at Bangor in October, 

 1835. Owing, probably, to the lateness of the season, very 

 few of the receptacles exhibited any appearance of the green 

 tuft of filaments which commonly terminate them. 



Sporochnus rhizbdes Ag., Grev. Alga Brit., 43. t. 6., was, 

 during a few days in October, 1835, washed ashore in con- 

 siderable plenty at Bangor. 



Bhodomeniajreniformis Hook. ; 2<ucus reniformis Eng. Bot., 

 t. 2116. A single specimen has occurred to Dr. Drum- 

 mond at Larne. In the summer of 1833, several specimens 

 in my collection were obtained at Carnlough Bay, near 

 Glenarm, by Miss Davison. 



Rhodomela subfusca Ag. ; i*ucus subfuscus Eng. Bot., t. 1 164. 

 Procured at Bangor in autumn, 1835. 



Halymeniafurcelldta Ag.; OTva furcellata Eng. Bot., t. 1881. 

 Two specimens in my possession were collected by Miss 

 Davison, at Carnlough Bay, in the summer of 1833. 



* Enteremorpha ramulbsa Hook. ;, £7'lva ramulosa Eng. Bot., 



t. 2137. ; I obtained in October,' 1835, near Bangor, where 

 it grows on the perpendicular sides of rocks, in company 

 with var. /3. of Ptilota plumosa. 



* Brydpsis plumbsa Ag., Grev. Alga Brit., p. 187. t. 19. A 



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