NORTHUMBERLAND AND DURHAM. 245 
The distinction between this species and the B.fastigiata, Linn., 
with which it had been previously confounded, has been already 
pointed out (Trans. Tynes. Club, v. ii., p. 150); but I was not 
at the time aware of its existence on our coast. Since then, 
however, specimens have been obtained from the deep water 
boats, and Mr. Hodge has also found it between tide-marks, at 
Seaham Harbour. Its range in depth appears, therefore, to be 
considerable. 
Sus-Orper. CTENOSTOMATA, Bush. 
Famity. ALCYONIDIADE. Johnston. 
44, ALCYONIDIUM, Lamouroucz. 
8. A. tinearE, Hinks, M.S. 
This encrusting Alcyonidium occurs not unfrequently from 
deep water at Cullercoats, running over shells in lines, 
generally branching from a central mass. The cells are 
oval, with prominent tubular apertures. 
44a, ARACHNIDIUM, Hincks. 
1. A. uippotHooipEs, Hincks, 
Hinks in Ann. Nat. Hist., 3rd ser., v. ix., p. 471, 
hs Alo 1 
On the tests of Ascidie, shells, &c., from deep water, Cul- 
lercoats—J. A. Seaham Harbour—George Hodge. 
The appearance of this species is somewhat between Hippothoa 
divaricata and Buskia nitens, having much the habit of the 
former, with occasional lateral processes like the latter ; but it 
differs from both in having the walls of the cells soft and mem- 
branous. From Alcyonidium lineare it differs in the cells being 
rather distant and united by a creeping fibre ; in Alcyonidium 
they are contiguous. 
Susp-OrpEer. PEDICELLINEA, Gervais. 
Famity. PEDICELLINIDA, Johnston. 
52. PEDICELLINA, Sars. 
2. P. Betetca, Van Beneden. 
Van. Ben. Rech. Bryoz., 2nd Pt. t. ix. 
