.•^QS Rev. T. R. R. Stebbing on 



joint of the palp is nearly equal in length to the first and 

 second combined. The first maxillee have three small setge 

 on the inner margin of the small inner plate *, the outer plate 

 carries the usual ten spines. The maxillipeds are chiefly 

 remarkable for the stout and prominent development of the 

 chin-like base. As the figure shows, one of the palps has 

 suffered an injury. It is noticeable that the cicatrice is in the 

 middle of tlie third joint, not, as might have been expected, 

 and as is the case with the likewise damaged lower antennae, 

 at an articulation. 



First Gnatliopods. — The side-plates are very large, much 

 longer than deep, produced forwards so as completely to cover 

 tlie mouth-organs. The second joint of the limb, attached 

 near the hind margin of the side-plate, is directed backwards ; 

 in length it about equals the hand, but is much narrower. 

 The front margin is channelled and distally lobed. The fourth 

 joint has three tufts of setaj on the hind margin and a small 

 pointed apex. The wrist is triangular, cup-shaped, scarcely 

 longer than broad. The length of the massive hand is equal 

 to more than twice the breadth ; its margins are nearly 

 parallel, but the front is regularly though slightly convex, 

 while the hinder is somewhat sinuous. The palm is a little 

 oblique, though at the end forming a right angle with the 

 liind margin. The curved finger is stout at the hinge, and 

 its apex very decidedly overlaps the palm. 



Second Gtuithopods. — The side-plates scarcely half the 

 length of the preceding pair ; the limb very similar in struc- 

 ture to that of the first gnathopods, except that the hand is 

 rather shorter and rather narrower, with a much more sinuous 

 palm, within the point of which the apex of the short much- 

 curved finger closes down. The setee on the rounded apical 

 part of the hand's front margin are very long. Both pairs of 

 gnathopods are bulky, and as the base of the maxillipeds is 

 also thick, it seems as if there were no room for the animal to 

 draw up its " hands " into concealment between the side- 

 plates, as Amphipods in general are so inconveniently fond of 

 doing. The lateral view of the specimen shows the actual 

 undisturbed position in which the gnathopods were observed. 



First and Second Perwopods. — The side-plates are similar 

 to those of the second gnathopods, and so also are the broadly 

 flask-shaped branchial vesicles. Neither in these nor in the 

 following perseopods were any distinguishing features 

 discerned, and the general character will be sufficiently seen 

 by the figures. 



* According to Delia Valle the first maxillse in Amphithoe are devoid 

 of an inner plate ; but this is contrary to my experience. 



