148 Abstract of a Paper on Irish k'lgce, 



spent at Bangor, on the coast of Down. To Miss Ball, of 

 Youghal, I am indebted for such species as she has added to 

 our flora since the departure, about the end of last summer, 

 of William Henry Harvey, Esq. for the Cape of Good Hope, 

 to which time he had, as far as in his power, completed the 

 history of Irish A'lgse : in every instance these species were 

 determined by Miss Ball previous to their being forwarded. 

 Dr. J. L. Drummond's fine collection was likewise most kindly 

 made available to me at all times ; and it will be perceived 

 that from it considerable information has been gleaned. 



Species new to Ireland. 



Asperococcus ? pusillus Hook. Brit. Fl., ii. 277. Collected by 

 Miss Ball, at Ballycotton (co. of Cork), in August, 1835. 

 In September, I foundjt growing in the rock-pools at Ban- 

 gor. In both places it was parasitic only on Chorda filum, 

 as originally described. 



Dictybta atomdria Grev. Algae Brit., p. 58. LHva atomaria 

 Eng. Bot., t. 419. Fine specimens, of the extreme size de- 

 scribed by Dr. Greville, were gathered by Miss Ball, at 

 Ballycotton, in August, 1835. 



Laurenc'ia tenuissima Grev. ; jPucus tenuissimus Eng* Bot., 

 t. 1882. A single specimen was obtained near Youghal 

 (co. of Cork), in autumn, 1835, by Miss Ball. 



Gigartina erecta Hook.; Gracilaria erecta Grev. Alga: Brit., 

 p. 124. t. 14. By minutely examining the vegetation of 

 the rock-pools about Bangor at low water, when the sun 

 shone brightly upon them, I procured a few specimens in 

 autumn, 1835. 



Gigartina pistilldta Lamour. ; jPucus Gigartinus Eng. Bot., 

 t. 908. A single specimen, in fruit, occurred to me at Bangor 

 in September, 1835 : so characteristic is the figure in En- 

 glish Botany, that, from recollection of it alone, I was en- 

 abled to distinguish its species as it lay upon the beach. 

 On looking back to some Jf'lgae collected by Mr. Hyndman 

 and myself at the same place in the previous month of 

 March, I found another specimen, likewise in fruit. 



* Chondrus Brodicex Grev. ; Fucus BrodiaeV Eng. Bot., t. 1966. 

 I gathered several specimens, in fructification, near Ban- 

 gor, after a severe storm from the north-west, in October, 

 1835. 



Sphaceldria filicina Ag. ; S. ^ypnoides Grev. Crypt. Fl., t. 348. 

 Of this singularly beautiful species a specimen occurred to 

 Mr. Hyndman and myself, in March 1835, near Bangor. 



Polysiphbnia violdcea Grev.; Hutchinsza violacea Lyng ? Spe- 

 cimens gathered by Dr. Drummond, in June, 1834, at Ban- 

 or, have been named as above by Dr. Greville. 



