XYLOPHAGA. 



anterior smaller, placed on the superior margin close to 

 the beak. 



This GenuSj of which only one species is at present 

 known, pierces wood, to the depth of from half an inch 

 to an inch, where it forms a clavate tube, without any 

 lining ; and as we are informed by Dr. Turton, its animal 

 fixes itself by a fleshy disk to the lower part of the tube. 

 We think, that on account of its having anterior acces- 

 sory valves, and its not being possessed of the two oper- 

 cula and the shelly tube, it must be regarded as more 

 nearly related to Pholas than to Teredo. 



The specimens sent to us by Dr. Turton were dis- 

 covered in a part of wreck dredged up near Berry Head. 



