PHRYXUS FDSTICAUDATTJS. 239 



The head is broadly semicircular in form, the middle 

 of the anterior margin produced into a conical lobe repre- 

 senting the organs of the mouth, at the sides of which are 

 affixed the two pairs of antennae, varying in length as 

 above described in the characters of the genus. 



The body is oval, with the sides symmetrical, the seg- 

 ments well marked by incisions, with the sides of the 

 segments themselves rounded ; on the underside the seven 

 pairs of swollen obtuse feet are affixed, near the sides of 

 the body, each being terminated by a small claw with a 

 minute obtuse finger. The four basal segments of the 

 tail are very much narrower than those of the body, and 

 become gradually narrowed to the fifth or terminal joint, 

 which forms a large clavate mass ; the sides of each of the 

 four basal segments of the tail are furnished with a pair 

 of elongated clavate appendages for breathing. 



We have only seen three specimens of this species, 

 which were discovered by our valued correspondent, 

 Mr. Edward, of Banff, attached to the branchiae of the 

 common Soldier Crab, Pagurus Bernhardus, on the 12th 

 December, 1864. 



