500 COROPHTID^. 



lius; but in our specimens the teeth which arm the 

 inferior antennae vary from those represented in the 

 figure given by that author ; the apex of the teeth 

 reaching, in our specimens, rather beyond the extremity 

 of the joint on the right, but not so on the left ; there is 

 also a small tooth on the fifth joint antagonizing with 

 those on the fourth. There is also a strong process or 

 blunt tooth upon the second joint of the left antennae, 

 but which appears to be less developed on the right. A 

 few fine hairs exist upon the same antennae, but in 

 one of ours we only saw a few short stiff points ; 

 probably these were hairs, as long as those represented 

 by Bruzelius, when the animal had but recently shed 

 its exuvium, but which are now rubbed down by fre- 

 quent use of the organ in grasping foreign substances. 

 Bruzelius says that it is found on the coast of Norway 

 from the most northern point to Bohusia, and is rare. 

 The last three segments of the tail are very short and 

 are fused together — a circumstance that has been pre- 

 viously pointed out by Bruzelius, and which a recent 

 opportunity has enabled us to confirm. 



