J 50 Abstract of a Paper on Irish A'lgce. 



single specimen, growing on Corallina officinalis, occurred 

 at Bangor in September, 1835. 



* Polysiphonia fruticulbsa Grev. ; Fucus fruticulosus Eng. Bot., 



t. 1686. Found growing in the rock-pools at Bangor in 



October, 1835. 

 Polysiphonia Brodiai Grev.; Conferva BrodiaeV Eng. Bot., 



t. 2589. Bangor, May, 1831. Dr. Drummond. 

 Polysiphonia stricta Grev. ; Conferva stricta JDillw. Conf., t. 4-0. 



Belfast Bay, July, 1824?. Dr. Drummond. 

 Polysiphonia parasitica Grev. ; Conferva parasitica Eng. Bot., 



t. 1429. In the same manner that Gigartina erecta was 



procured, I obtained specimens of P. parasitica growing 



upon various A'lgse in the rock-pools at Bangor in October, 



1835 : in Strangford Lough, also, it has occurred to me. 

 Griffiths'^ multifida Ag.; Conferva multitidsL Eng. Bot., 1. 1816. 



A single specimen was found by me at Bangor, in October, 



1835. 



* Callithdmnion Plumula Lyng. ; Conferva Turners' Eng. Bot., 

 t. 1637. Thrown ashore in great abundance on the low 

 oozy part (and there only) of Belfast Bay, about Holy- 

 wood, in September and October, 1835. Dr. Drummond 

 and W. Thompson. 



Callithdmnion Turneri Ag. ; Conferva Turners Eng. Bot., 

 t. 2339. Larne ? Dr. Drummond. Bangor, W. T. 



Callithdmnion tetragbnum Ag. ; Conferva tetragona Eng. Bot.) 

 1. 1690. : on two occasions has been received by Dr. Drum- 

 mond from Bangor ; occurred to me there not uncommonly 

 in October, 1835. 



Callithdmnion pedicelldtum Ag.; Conferva pedicellataZfog. Bot., 

 t. 1817. A few specimens were gathered at Bangor in 

 October, 1835. 



Coriferva intricdta Grev. Fl. Edin., p. 315. Observed by Dr. 

 Drummond as commonly investing Sphacelaria cirrhosa in 

 Belfast Bay in September, 1835. See Harvey in Brit. Fl. 

 (p. 352.), on C. implexa. 



Co?iferva pellucida Huds. Eng. Bot., t. 1716. Once found 

 near Larne by Dr. Drummond. Grows sparingly in the 

 rock-pools at Bangor, but was cast ashore plentifully 

 during October, 1835. 



Mesoglbia virescens Carm. Brit. Fl., p. 387. A single speci- 

 men has been obtained at Larne by Dr. Drummond. 



Species generally rare, or otherwise worthy of notice. 



Cutler\& multifida Grev. Algae Brit., p. 60. t. 10. Specimens 

 varying exceedingly in form were collected by Miss Ball at 

 Ballycotton in August, 1835. 



