BEANIA. 369 



are so thin and transparent that the polype can be dis- 

 cerned through the walls. They have eight tentacula. 



This, though common in many places, does not occur on 

 our Ayrshire coast. I have gathered it at Liverpool, and 

 at Portrush, Ireland. 



Genus XXV. BEANIA, Johnston. 



Gen. Char. Polypidom confervoid, horny ; the shoots creeping, 

 filiform, tubular, irregularly divided ; the cells very large, sessile, 

 erect, scattered and solitary, ovate, with a double spinous keel 

 on one side. Polypes unknown. 



1. BEANIA MIRABILIS, W. Sean. (Plate XIX. fig. 75.) 

 Hab. On bivalve shells, or on the roots of Cellularia 

 avicularis, very rare. Scarborough, Mr. Bean; dredged 

 off Scilly, Mr. M 'Andrew ; attacked to a cork, near Pal- 

 mouth, W. P. Cocks; Sidmouth, Mrs. Gatty; Exmouth, 

 Miss Cutler; Salcombe, Rev. T. Hincks; PeterheacT, one 

 specimen, Mr. Peach. 



Dr. Johnston says, " This remarkable genus was dis- 

 covered by Mr. William Bean of Scarborough. I felt much 

 gratified in associating it with his name. He is well known 

 to naturalists generally, by his multitudinous discoveries in 

 British zoology, recent and fossil." 



2 B 



