406 
GAMMARIDiE. 
peduncle, and varies from nine to fifteen articuli. This 
great variation in the number of articuli to the flagellum 
is dependent upon age, sex, and accident, and demon- 
strates the little value, in a specific point of view, which 
ought to be placed upon the length of this portion of the 
antennae. The flagellum will sometimes double the 
number of its articuli in a single moult. 
The coxae of the three (or four) anterior pairs of legs 
have the inferior margin serrated. The hands of the first 
two pairs are long-ovate, slightly tapering, and having 
the palm not defined ; the second pair being rather 
larger than the first. The last three pairs of legs have 
the thighs oval, and the posterior margin serrated. The 
last pair of caudal appendages are long, and have the 
branches subfoliaceous, and equal in length. The 
colour of the animal is whitish, faintly marked with 
blotches of rose-colour. The skin, as seen through a 
low power of the microscope, is rough ; this is occasioned 
by its being covered by a series of minute points, which 
appear to stand obliquely from the surface, as shown in 
our cut. 
We have dredged this animal in Plymouth Sound, and 
found it among the refuse brought in by the trawlers. 
Mr. Loughrin has sent it to us also from Polperro. 
