152 Mr. A. 0. Walker on 



uropods ; liind mar<^in of the first joints smooth, more or 

 less concave, and endinj^ below in a subacute tootli. 



Telson reaching to the base of the peduncles of the third 

 uro[)ods, wider at the base tlian long, rather deeply notched. 



Length 30 mm. 



Iphimedia Hodgsoni, sp. ii. 



Coulman Island, 13/1/02, 100 fath. ; one. 



The whole body is clothed with tine spine-like teeth directed 

 backwards and arranged in zones on the segments of the 

 mesosome and plcon; the side-plates are also densely spinous 

 and appear to be a little deeper than the segments. The 

 body is but little compressed laterally and is widest over the 

 first and second segments. The antenna are rather short, 

 subequal, and directed outwards ; the basal joints of the 

 upper are thickly covered with branching spines. The 

 rostrum is almost straight and about as long as the rest of 

 the head. 



Length about 25 mm. 



Eusirus microps, sp. n. 



W.Q. 10/5/03, 10 fath., one, and 1/6/03, one. Penguin 

 Rookery, Mount Erebus, Feb. 1901 ; one, large. 



Body: last segment of mesosome and first two of j)leon 

 carinate, with a postero-dorsal tooth ; carina of the tiiird 

 pleon-segment rounded behind ; hind epimeral margin rather 

 convex, faintly crenate, posterior angle produced and acute; 

 one or two small teeth on the lower margin in front of it. 

 First urus-segment dorsally depressed. Side- plates rather 

 small, the first subquadrate, crenate below. 



Head: eyes dark, almost round, diameter less than that of 

 the first joint of the ujyper antennce. 



Upper antenna' reaching to the base of the uropods ; first 

 joint shorter than the second, with a distal prominence on the 

 lower margin terminated by an acute tooth ; the second joint 

 expands distally and is furnished with two or three sharp 

 teeth ; the third is rather shorter than the first of the 

 fiagellum. Ai)pendage as long as the first joint of the 

 flagellum. 



First gnathopods : first joint robust ; hinder angle of the 

 third joint acute and, as also the carpal spur, densely setose j 

 hand much longer than wide. 



Second gnathopods rather longer than tlie first; the front 

 margin of the second joint produced over the third. 



First and second peraopods very slender, the first joint 

 about six times as long as wide and subequal to the next two. 



Last three pairs of peravpods increasing in length back- 



