32 4 
GAMMARIDiE. 
iofero-posterior angle of tlie second and third segments 
of the tail produced to a point. The superior antennae 
are about two-thirds the length of the animal, exclusive 
of the long caudal appendage ; being rather longer than 
represented in the figure illustrative of this description. 
The inferior antennae are about half the length of the 
superior, but the flagellum is as long as the peduncle. 
The hands of the second pair of legs are scarcely 
appreciably larger than those of the first. They 
approach in form an imperfect oblong square, the nar- 
rowest diameter is nearest the wrist, the broadest at the 
palm ; the inferior margin is longer than the superior, 
and furnished with four fasciculi of hairs, each standing 
upon its own protuberance, and increasing in length as 
they approach the palm ; the palm is produced an- 
teriorly as it approaches the inferior angle, with which 
it obtusely forms an angle somewhat less than a right 
angle, a short distance within which stands a long stout 
double-pointed spine, against which laterally the finger 
impinges when closed. The fingers of the last three pairs 
of walking legs are distinctly unguiculate, the point at 
which the nail originates being defined by a sharp tooth. 
There appears little else that can distinguish this from 
the preceding species, with which it was found associated 
in an old pump at Ring wood, as well as un mixed with 
any other species in a well but recently dug at Upper 
Clatford, near Andover, Hants, by the Rev. Mr. Hogan, 
who has kindly presented specimens to us as well as 
to the Hope Museum at Oxford. We have also 
been favoured with specimens caught in water from a 
pump at Warminster, Wilts, by Miss Margaret E. 
Slent ; and since this has been in the press Professor 
Kinahan has sent us specimens taken in great abundance 
in an old well sunk in limestone in Dublin, in which a 
