NOTAMIA BUHSARIA. 101 



Zoarlum pearly, much branched dichotomously, the 

 branches curled at the extremities. Zocecia bracket- 

 like, broad above, and produced at the outer angle into 

 a sharp point, narrowed below ; the aperture occupying 

 almost the whole of the front; the oral valve semicir- 

 cular, set somewhat obliquely near the inner angle above. 

 Avicularia borne on short tubular stems and shaped 

 like a tobacco-pipe, the head tumid, widening from the 

 base upwards, with a pointed mandible and a minute 

 beak. Ooecia none. 



Polypide with 10 tentacles. 



HABITAT. On Fuci, stones, shells, Crustacea, &c., in shallow 

 water. 



LOCALITIES. Devon, on Hydrallmania falcato (Mrs. 

 Griffiths) : Isle of Wight, abundant (C. W. P. and Busk) : 

 Swanage Bay, Isle of Purbeck, extremely fine and plenti- 

 ful, 3-10 fathoms (Busk and T. H.) : Cromer (Mr. 

 Wigham) : Hastings, on Rytiphloea pinastroides (M. 

 Tumanowicz) : Brighton (Mr. Pike) : Weymouth (Bower- 

 bank) : off Essex ; Southend and Ramsgate (teste 

 Busk). 



Notamia bursaria is no less remarkable for its beauty 

 than for the singularity of its structure. It grows in 

 exquisitely soft and feathery tufts, of a pearly whiteness, 

 formed of most delicate material, and gracefully curled at 

 the extremities. The erect shoots rise at intervals from a 

 rather stout creeping tube, which is filled with a yellowish 

 granular substance. The stem is slightly attenuated 

 towards the point of origin, and for some distance above 

 it is destitute of cells. The two primary zooecia are quite 

 rudimentary, and originate in a slight dilatation of the 

 stem, which is divided by a central wall or partition into 

 two chambers. From these a second pair proceed, which 

 approach more nearly to the normal condition ; they 



