ASCIDIOIDA. 475 



dredged in Belfast Bay, Dr. Drummond and W. T., and timber taken up 

 at Kingstown, Dr. Ball. 



Genus AcAMAUCHls. 

 A. neriUna, Lamx. 



North of Ireland, Mr. Templeton. (Probably Cellularia avicxdaria, 



A. plumosa ? 



Dredged in Strangford Lough, 1834. G. C. H. and W. T. (two speci- 

 mens). Dredged at Bangor, 1838, Dr. Drummond (one specimen). 



Genus EscHARA. 



E. foliacea, Lam. 



Obtained by Mr. W. Todhunter, off Cape Clear, winter of 1848. 



Genus Retepoea. 

 R. Bemiiana, King. 



Cape Clear. Prof. AUman. 



Ge7ius Fakcimia. 



F. salicornia, Johnston. 



Dredged in Belfast and Dublin Bays, W. T. 



F. sinuosa, Hassall, 

 Dredged in Belfast and Dublin Bays, W. T. 



Ge7ms Alctonidium. 

 A. gelatinosum, Lamour. 



Of occasional occurrence on the North-East coast, W. T. 

 Dredged at Bangor, Belfast Bay, in 1835 and subsequently, W. T. 

 Youghal, Miss Ball. 



A. hirsutum, Johnst. 



Not uncommon on the northern shores, W. T. 



Down and Antrim coasts, Dr. Drummond and W. T. I have some- 

 times found it in profusion investing various species of Alga^, particularly 

 the Floridea, of which the Delesseria (data would seem to be the favour- 

 ite : appears occasionally to have an independent existence, no portion of 

 a plant being visible at the base ; whether it may have absorbed the lad- 

 der by which it aspired to its full height, I do not know. Clifden, Con- 

 nemara, W. T. Glendore, Co. Cork, Prof. AUman. Youghal, Miss Ball. 



A. ? jHirasiticum, Johnst. 



Attached to Sertulari(S, &c., on the northern and eastern shores, W. T. 

 Dublin Bay, 1834, Prof. Harvey ; common here, chiefly on IHunudaria 

 falcata and Sertuluria argeiitea, 



A. echinatum, Johnst. 



Commonly incrusting univalve shells around the coast. 



March, 1844. — Mr. James M'Adam, jun., who has just returned from 



