ANTENNULARIA. 141 



1. Antennularia ANTENNiNA, il/r5. /Fizr^. (Plate YII. 

 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. Scoulerfrom 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 Hke 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 



