ANTENNULARIA. 141 
1. ANTENNULARIA ANTENNINA, Mrs. Ward. (Plate VIL. 
fig. 20.) 
Hab. Grows in clusters in the sand or on stones lying in 
the sand, rooted together by numerous fibres matted with a 
mixture of broken shells and sand. Pretty generally distri- 
buted. We have not found it on the Ayrshire coast, if it 
is distinct from the succeeding. It has, however, been got 
by the Reverend Mr. Urquhart at Portpatrick, and we have 
remarkably fine specimens from Dr. Beverley Morris, from 
the coast of Yorkshire; from Dr. Scouler from Dublin Bay; 
and from Major Martin, from Lough Swilly. These last 
were very handsome, but the stems smaller and more com- 
pact than usual, and the branchlets shorter. 
The height is often upwards of a foot. It is Jointed from 
root to tip like a lobster’s horn, or like the vertebrae of 
fishes. ‘‘ Each articulation is surrounded by short capillary 
branches, which, when magnified, have the appearance of 
sickles, and bend in towards the main stem. Along the in- 
side of these are placed minute sockets, which support small 
open denticles (cells) of a cup-shape, which are of so tender 
a nature that they are scarcely visible but in recent speci- 
mens. Between the minute hair-like branches we have ob- 
served on some specimens small egg-shaped vesicles fixed 
