PHRYXUS FUSTICAUDATUS. 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 antennz, 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 branchiz of the 
common Soldier Crab, Pagurus Bernhardus, on the 12th 
December, 1864. 
