PANDARUS. 319 



ing the claws of the first and third pairs of foot-jaws through 

 the skin. 



Dixemouea Lamn^e, Johnston, sp. — Linear-oblong ; 

 dorsal plates smaller than in preceding, oval, smooth, and 

 of a pale colour ; cephalothorax with a brown blotch in 

 front ; centre of upper part of last segment of thorax with 

 a long black spot. 



Hab. Berwick Bay : on a Beaumaris shark (Lamna Mo- 

 nensis). 



Gen. 177. PANDARUS, Leach. 



There are several pairs of plate-like appendages covering 

 the thorax. All the feet fitted for walking, and armed near 

 the end with short thick hooks. Dr. Baird adds, that 

 " these hooks are evidently useful to the animal in moving 

 or walking, by enabling it to attach itself to the bodies upon 

 which it creeps." 



All the species are parasitic on the shark tribe; so- that 

 these ferocious tyrants of the sea are themselves subject to 

 fish-lice. 



Pandarus bicoloe, Leach. (Plate XIX. fig. 3.) — Body 

 elongated-oval. Cephalothoracic segment, and the second 



