REPORT ON THE AMPHIPODA. 1293 



Uropods. — Peduncles of the first pair a little shorter than the outer ramus, which has 

 four strong teeth on the outer and two on the inner margin near the apex, the upper part 

 being finely pectinate ; the rather shorter inner ramus has one or two teeth on each 

 margin ; the second pair are similar to the first, but shorter and with fewer teeth ; the third 

 pair are shorter than the second, the peduncles set wide apart, broad, longer than the 

 rami, of wdiich the outer is slightly the longer, denticulate on the inner margin and 

 having an apical spinule ; the inner ramus is denticulate chiefly on the outer margin. 



Telson transversely oval, much broader than long, less than half the length of the 

 peduncles of the third uropods. 



Length. — One-fifth of an inch. 



Locality. — " Antarctic, surface, February 2, 1874"; lat. 52° 4' S., long. 71° 22' E. 

 One specimen. 



Remarks. — The specific name alludes to the place of capture ; the shape of the telson 

 seems to separate this species from all others within the genus that have been hitherto 

 intelligibly described. 



Vibilia sp. 



Where the fifth and sixth segments of the pleon coalesce there is a small groove at 

 the centre of the back, limited to about a quarter of the whole dorsal breadth. 



Eyes nearly round. 



Upper Antennae nearly as in Vibilia viator. 



Lower Antennae. — The flagellum with three joints, of which the second is the 

 shortest. 



Upper Lip with the distal lobes strongly furred. 



Mandibles. — The cutting edge with fifteen or sixteen teeth; the first two of the 

 stouter spines in the spine-row having each one lateral denticle on the outer edge. 



Lower Lip. — The outer corner of the principal lobes not flanked by a pronounced 

 tooth, yet with a little irregularity of outline. 



First Maxillae. — Inner plate small, oval. 



Maxillipeds with three spinules on the outer margin of the outer plates. 



Gnatliopods distinguished from those of Vibilia australis, chiefly in the first pair, 

 by having the first joint's front margin a little less bulging, and in the second b)^ 

 having the process of the wrist narrower, reaching nearly to the apex of the hand. 



Uropods. — Peduncles of the first pair reaching just to the apex of the telson, a 

 little longer than the rami ; the narrower peduncles of the second pair reaching very 

 nearly as far as those of the first, very little longer than the rami ; the peduncles of the 

 third pair the broadest, intermediate in length between the other two pairs, longer than 

 the rami, the outer ramus a little shorter than the inner ; the rami of the second pair a 



