BRITISH ZOOPHYTES. 231 



This species has been confounded with B. phimosa, 

 but it is not so gi'aceful. It appears to take its place 

 as a northern form. 



It derives its specific name from the fact that when 

 dried it becomes purple in colour. 



Each cell is surmounted by a single blunt- jointed 

 spine. The avicularia are larger than in B. plumosa. 



7. B. MuRKAYAiJA, Johnston. 



Flustra Murrayana {G. J., D. L.), Flabellaria spiralis 

 (Gray), Avicella multispina {Van Ben.), Menipea fruti- 

 cosa (Packard). 



Hab. : Scarborough {Bean), Northumberland {Miss 

 Dale), Yorkshire and Orkney {Lieut. Thomas, R.N.), 

 Stonehaven {Lady Keith Murray), Peterhead (G. W. P.), 

 Leith, Newhaven {D. L., jnn.), Lamlash {T. H.). 



This species very much resembles in mode of growth 

 some kinds of Flustra. It grows to about 1 inch in 

 height^ and is light coloured. The zooecia are arranged 

 in strap-shaped branches, and 4 — 12 in breadth. Each 

 cell is armed with a number of marginal spines on 

 each side, and one blunt short spine at each of the 

 upper angles. The ooecia are marked with radiating 

 lines. 



There is a variety of this species {fruticosa) which 

 is more slender in habit, and has narrower branches. 



Genus III. Beania, Johnston. 

 Zoarium subcorneous or calcareous, erect or decum- 

 bent. Zooecia sessile, erect, scattered, united one to 

 the other by a slender tube, originating from the 

 dorsal surface or from the side near the base. Aperture 

 occupying the entire front, the margin furnished with 

 hollow spinous processes arching over the opening; 



