62 
GAMMARIDiE. 
inferiorly produced to nearly half the length of the 
carpus, and furnished at the apex with a few hairs, some 
of which are straight, while others are of a form which 
appears to he peculiar to this species, consisting of a kind 
of plumose tuft, or brush mounted on a stalk (fig. h'). 
The wrist is long, and increases in breadth towards the 
extremity. The hand is shorter and narrower than the 
carpus ; the form is long-ovate, having the upper and 
lower margins slightly convex ; the palm is short, 
oblique, and imperfectly defined ; the finger is much 
longer than the palm, and is nearly straight, a circum- 
stance which demonstrates it to be a feeble organ of 
prehension. The second pair of legs are much more 
powerful and longer than the first. The wrist is short, 
and the hand is quadrate, being but a little longer than 
broad ; the palm is oblique, and serrated with coarse, 
irregular, blunt teeth on the half nearest the base of the 
finger, and deeply emarginate towards the inferior angle, 
which is produced to a sharp point. The finger is arched, 
and impinges, when closed, into the emargination of the 
palm, which, from the irregular form of the latter, must 
enable it to hold securely any object in its grasp. The 
specimen from which our figure was taken enabled us to 
see the muscles within the organ, proving that the ex- 
tensor is smaller and much less powerful than that which 
forces the finger into contact with the palm. The other 
legs are all of the same length, and are tolerably strong. 
The second joints of the last two pairs are broadly de- 
veloped, and have the posterior margin scalloped ; this is 
also the case with the fourth joints of the same legs, 
which are posteriorly produced to a blunt downward 
point, a small hair springing from the depression between 
every scallop. The feet are much curved, and have the 
anterior margins armed with short hairs, or rather spines, 
