62 GAMMARIDJE. 



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 be peculiar to this species, consisting of a kind 

 of plumose tuft, or brush mounted on a stalk (fig. h') t 

 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, 



