ASCIDIOIDA. 
471 
L. assimilis, Hassall. 
On dead valves of Pecten maximus. 
Dublin Bay, Dr. Hassall. 
L. Hassallii, Johnston. 
Dublin Bay, Dr. Hassall. 
L. coccinea, Johnst. 
This species first occurred to me of a snow-white colour, on the bark of 
a tree washed ashore at Bangor (Down) in January, 1834. On stones and 
shells dredged in deep water on the North-East coast, it was of the ordi- 
nary pale-reddish purple hue. 
L. simplex , Johnst. 
I find this very fine and well-marked species on old bivalve shells, 
Modiola vulgaris , Pecten opercularis , &c., dredged on the same occasion 
as Alecto major. 
L. ventricosa , Hassall. 
Dublin Bay, Dr. Hassall. 
L. Hyndmanni, Johnst. P 
As last. Marked with doubt on account of the specimens being much 
worn. 
Found with L. simplex in deep water off the Copeland Isles. 
L. ovalis, Hass. 
Feb., 1848. — Adherent to Cellepora cervicornis growing on a stone 
dredged off the Whitehead entrance to Belfast Bay, in 40 fathoms water. 
Dr. Hassall considers it a very rare species, and obtained but one Irish 
specimen at Kingstown. I have but to add that my specimen is of a 
beautiful silvery-white hue, and most thin and delicate texture, that the 
front portion of the aperture* rises up into a short process, usually bifur- 
cate, and that from its hinder (distal, Dr. J.) spring two or three very long 
and delicate spines. See Johnston, p. 308. Johnston’s fig. 1, pi. 56, re- 
presents my specimen well, but in it the spines are longer and more 
delicate, terminating in a sharp point. 
• L. linearis, Hassall. 
Giant’s Causeway and Kingstown Harbour, Dr. Hassall. Beaufort’s 
Dyke, Capt. Beechy. 
L. auriculata , Hassall. 
Bray, Dr. Hassall. 
L. punctata, Hassall. 
Ireland, Dr. Hassall. 
L. biforis, Johnst. 
Adherent to stone dredged in 40 fathoms, Feb., 1848, off Whitehead, 
Co. Antrim, on which a broken piece of Cellepora cervicornis grows. See 
specimen on base of stone touching largest specimen, Tubulipora obelia. 
* “ Upper lip,” Johnst. 
