STAURIDIIDJE. 



"All the motion/' Mr. Holds worth remarks, "takes 

 place above the lower arms, which always appear to retain 



Fig. 5. 



their position at right angles to the lower part of the 

 body." The apparatus for the capture of food is very 

 complete. The spherical bulb at the extremity of the 

 upper tentacles is a congeries of thread-cells, each of 

 which furnishes its projectile; the arm itself is endowed 

 with vigorous percussive power, and its surface is studded 

 with minute tubercles surmounted by sensitive palpo- 

 cils. The false tentacles are rounded at the tip, which is 

 thickly covered with the tactile hairs ; and their function 

 seems to be to give notice of the presence of animalcules 

 or other prey. If anything touches one of them, the head 

 and upper arms are instantly bent towards it. 



The specimens of the gonozooid examined by Mr. Holds- 



