308 



PLUMFLARIIDJE. 



P. FRUTESCENS rises from a fibrous l)ase to a height of 5 or 

 (5 inches. The main stem divides into a number of 

 branched shoots, which give it a very bushy appearance. 

 A marked peculiarity is the line of bifid ramuli, which is 

 borne on the pinnse parallel with the central stem. 



Hob. On stones and shells, in deep water ; rare. But 

 few habitats for P. frutescens have been recorded, though 

 it has a wide range. It is essentially a deep-water 

 zoophyte, and seems to be cast ashore in small quantity. 

 On the Yorkshire coast it is rare. It is occasionally 

 obtained amongst the immense masses of zoophyte which 

 a rough easterly gale flings on the sands at Filey ; and 

 Mr. Bean has dredged it at Scarborough. Mr. Alder 

 reports it rare off the coasts of Durham and Northum- 

 berland. Oban (T. H.): Stonehaven, Kincardineshire 

 (Lady Keith Murray) : Shetland, Middle Haaf ; Hebrides 

 (A.M.N.): Cornwall, not rare (Couch): South of Ireland. 



[Algoa Bay (Krauss).] 



Fig. 37. 



Corbula of Aglaopheniu phima. 



