402 
GAMMARUm 
the preceding, and have the branches of equal length. 
The telson is double, the apex of each division 
being obliquely truncate, and furnished with a single 
hair. 
The following vignette represents the Mallard Buoy, 
in Plymouth Sound, near which this species was dredged 
by us, in company with Dr. Falconer and Professor 
Kinahan. 
