ATYLUS GIBBOSUS. 
249 
increase considerably towards the distal extremity, 
mostly on the posterior margin of the legs, where they 
are furnished with three or four strong spines, which 
appear to be of sufficient length and strength to assist 
the fingers in their prehensile acts ; the hands are not 
longer than the wrists, and those of the posterior pair 
are slightly bent or waved, the fingers being directed 
posteriorly. The penultimate pair of caudal appendages 
are much shorter than the other two. The terminal 
caudal plate is long, tapering, and divided from the apex 
nearly to the base. 
This species was first procured by the late Mr. Geo. 
Barlee, from the Shetlands ; and it has since been taken 
by the Rev. A. M. Norman and Mr. Jeffreys, in the Outer 
Skerries Harbour, as well as in from seventy to ninety 
fathoms of water, sixty miles east of the Shetlands. 
Mr. Alder has also taken it on the coast of Northumber- 
land. 
