398 NOTES ON THE HYDEOIDS OF PLYMOUTH. 



Aglaophenia mybiophtllum, Linn. 



A few specimens brought in by trawlers from deep water. 



Plumularia frutescens, Ellis and Solander. 

 From Wembury Bay. 



Plumularia catharina, Johnston. 



Not uncommon. Duke Rock. Winter Shoal. Off Stoke Point. 



Plumularia setacea^ Ellis. 



Common in the Sound. The variety of branched and luxuriant 

 habit mentioned by Hincks (Brit. Hydroids, p. 297) is very common, 

 generally growing on Halichondria paJiicea. 



Plumularia similks, HincJcs. 



Jennycliff Bay. Rocks below Laboratory. Common. 



Plumularia echinulata, Lamarck. 



Growing on weed; not very common. 



Plumularia pinnata, Linn. 



Common. Duke Rock. Barnpool. Off Mewstone. 



