140 



CLASS CRUSTACEA, 



phical Transactions ; it is accompanied by engravings 

 which we have copied, but the animal is not drawn with 

 sufficient accuracy to te referrible to any particular 



Head 0/ Alcivi/c. 

 Part of lower jaw removed to show the insect. 



The insect seen from above. 



species ; by this account it appears that, instead of at- 

 taching itself to the body of the fish, the parasite makes 

 safe its lodgement on the roof of the mouth. The 

 author thus describes it. 



