170 Mr. A. H. HassalPs Catalogue of Irish Zoophytes. 

 Order IV. Z. ASCIDIOIDA. 



VeSICTJLARIADjE. 



An undescribed zoophyte, belonging to this family, is occasionally 

 found in Dublin bay, investing Fucus senatus. Dr. Johnston consi- 

 ders it to be new both in species and genus. As specimens of it are 

 in Dr. Johnston's possession, I refrain from giving any detailed de- 

 scription ; I may, however, remark, that the animal, which I suc- 

 ceeded in detecting in a specimen preserved in spirits, is apparently 

 similar to that of Flustra, being doubled up in the cell in the same 

 manner, and having the head encircled with about twenty tentacula. 



Vesicularia. 

 Vesicularia spinosa. — Dublin bay; common. 



Serialaria. 

 Serialaria lendigera. — Dublin and Killineybays ; not common. 



Valkeria. 

 Valkeria uva. — On Fucus siliquosus, rare ; Blackrock. 



Crisia. 



Crisia cornuta. — On sponges, and various corallines; common in 

 Dublin and Killiney bays. 



C. chelata. — Blackrock; rare. 



C. eburnea. Parasitic on sea-weeds and zoophytes, particularly 

 on S. abietina. 



Killiney and Dublin bays ; common. 



C. luxata. — Killiney and Dublin bays ; frequent. 



C. aculeata. Cells disposed in a double series, armed with a long 

 spinous process ; joints of an amber colour. — A. H. 



Polypidom erect, bushy, about an inch in height, and beautifully 

 posted ; branches alternate ; jointed at irregular intervals ; inter- 

 nodes narrow at their commencement ; cells subalternate, tubular*, 

 the majority being furnished with a long spine, which arises from 

 the outer side. Vesicles much resembling a fig in shape, and dotted. 

 See Plate VII. fig. 3, 4. 



Brighton ; not unfrequent. 



Notamia. 



Notamia loriculata. The polypidom of this species sometimes 

 attains a height of eight or nine inches. 

 Dublin and Killiney bays ; common. 



Hippothoa. 

 Hippothoa catenularia. — Dublin bay ; rare. 



TuBULIPORIDiE. 

 TUBULIPORA. 



Tubulipora patina. The Discopora verrucaria of Fleming. 



