316 HISTORY OF BRITISH CRUSTACEA. 



Lepeophtheirus Thompsons Baird. — Carapace round; 

 in the male rather broader. Abdomen long, the length of 

 thorax. Caudal plates short, rather broad. Sternal fork 

 with sharp, simple branches. 



Hab. Ireland : on the turbot. 



Gen. 174. CHALIMUS, Burm. 



Feet as in preceding. Thorax with four distinct seg- 

 ments. Frontal plates without sucking-discs, but furnished 

 with a long and slender appendage from the centre of fore 

 surface. 



Dr. Baird remarks on this curious genus, which Kroyer 

 was disposed to think might prove the young of Caligus, 

 that the long and slender organ above alluded to ends in a 

 " round expansion like a sucker, by which it fastens itself 

 to the body to which it is found attached. The presence 

 of this organ would lead us to suppose that this animal 

 must lead a much more sedentary life than the rest of the 

 Caligidce, and it would appear in this respect to connect it 

 with some of the Lemeadce, which we shall find to possess 

 a somewhat similar organ of prehension." 



