A.MPHIPODA. 255 



Third perseopods: 1st joint wide, as long as the next 3. the posterior lobe 

 projecting one-third of the length of the hind margin In-low the top of it: front 

 margin with plumose seta' on the upper part and irregular spines on the lower; 

 till joint considerably longer than the 5th, the hind margin produced in a spinous 

 lobe (fig. 15. pp. 3 ). 



Fourth perseopods: 1st joint as wide as long, the front margin subangular, the part 

 below the angle irregularly spinous ; posterior lobe large, the margin evenly rounded 

 and smooth; 2nd joint short, with an angular prominence behind and 2 or 3 short 

 spines in front ; 3rd joint longer than the 2nd, with 3 spines on the front margin ; 

 1th joint twice as long as the 3rd, unevenly spinous on the front margin, which ends 

 with 1 long and 2 short spines; the hind margin is naked, but ends in a cluster of 

 unequal spines (one very long) on a truncate lobe ; the 5th joint has 12 spines, 

 increasing in length distally and a long terminal one on the front margin, and 3 short 

 ciliate spines on the hind (rig. 15. pp. 1 ). 



Fifth perseopods : 1st joint produced behind to the end of the 2nd joint, with long 

 plumose seta; on the lower margin : 2nd joint as long as the 2 next and much wider 

 at the top than any of the succeeding joints the distal third of the front margin cut 

 away; 3rd joint about half as long as the 4th, somewhat produced in front; 4th as 

 wide and more than half as long as the 5th, the front angle rounded off and spinous, 

 hind angle slightly produced and spinous; 5th joint oval; 6th narrowed rather 

 suddenly to a long crooked point (rig. 15. pp. 5 ). 



First uropods : rami curved, subequal, rather longer than the peduncle, inner 

 margins of peduncle and inner ramus spinous. 



Second uropods : rami straight, shorter than the peduncle, and spinous on their 

 inner margins, the peduncle stout, with a strong spine at the end of the inner 

 margin. 



Third uropods : rami narrow, lanceolate, longer than the peduncle, subequal ; the 

 outer the narrower, with a few very small spines on the outer and plumose seta? on 

 the inner margin ; the inner has a few setas on the outer margin near the end 

 (tig. 15. ur.). 



Telson divided almost to the base, the divisions pointed, with 3 spines before the 

 point on the outer margin (tig. 15. ur.). 



This species may be known by the form of the 2nd joint of the 5th perseopods, &c. 



Amphilochus, Sp. Bate, 1862. 

 Amphilochus neapolitanus (?), Della Valle. 



Muttuvaratu pearl oyster washings; 19th November, 1902. 



One young and imperfect specimen, length 1 '5 millims. 



For the synonomy of this species see ' Jour. Linn. Soc.,' vol. 28 (Zool.), p. 300. 



