426 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 115 



combined, fourth bearing sharp nail and several distal setae. Lower 

 lip with small inner lobes; outer lobes broad, rounding; mandibular 

 processes short. 



Gnathopods 1 and 2 of nearly equal length, 2 slightly longer; 

 second joint longer than sixth; fifth joint slightly over % length of 

 sixth; sixth joint longer than wide, upper and lower margins slightly 

 convex, lower margin bearing several groups of spines, palm slightly 

 oblique, armed on inner and outer margins with row of blunt spine- 

 teeth, without defining angle but passing into hind margin of joint 

 by evenly rounding curve, which also bears row of blunt teeth on 

 inner and outer margins; seventh joint stout, curved, bearing slight 

 protuberance on inner margin near hinge, with only apex closing 

 against palm. 



Pereopods 1 and 2 alike, 1 slightly the longer; fourth joint very 

 slightly expanded, with front margin produced slightly downward; 

 seventh joint strong, curved, about % length of sixth joint, bearing 

 nail, and prominent seta on inner margin. Pereopods 3-5 with second 

 joint expanded. Pereopod 3 shorter than 4 or 5, which are subequal 

 in length. Pereopod 3 with lower hind corner of second joint quadrate, 

 but bluntly rounding. Pereopod 4, second joint with hind margin 

 convex above and concave below, with scarcely any lower hind corner. 

 Pereopod 5 with hind margin of second joint evenly convex and 

 without any lower corner. Seventh joint of pereopods 3-5 like those 

 of 1 and 2, but larger, stronger. 



Coxal plates 1-4 not much deeper than their body segments. 

 Coxal plate 1 slightly expanded belov/ and slightly produced forward ; 

 lower margin rather flatly convex, provided with few spinules. Coxal 

 plates 2 and 3 deeper than long, with lower margin convex, bearing 

 few spinules. Coxal plate 4 slightly deeper than long, lower margin 

 convex, hind margin below excavation bearing row of short spines. 

 Coxal plate 5 with shallow front lobe bearing small spine, hind lobe 

 also bearing 1-2 spines. Coxal plate 6 much like 5 but not as deep. 

 Coxal plate 7, hind lobe bearing row of spines. 



Pleon segment 1, lower lateral margin convex, lower hind corner 

 represented by small produced angle, bearing setule, front margin with 

 several groups of setae and several small spinules. Pleon segment 2 

 with lower lateral margin nearly straight, lower corner sharply pro- 

 duced, bearing spinule; lower margin with several groups of setae and 

 several spinules. Pleon segment 3 much like 2 but lower hind corner 

 possibly slightly more sharply produced. Urosome segment 1 bear- 

 ing dorsally 4 groups of spines, 2 outer having 3 spines each, 2 inner 

 4 spines each. Urosome segment 2 bearing dorsally 2 groups of 3 

 spines each, between which are 2 central spines. These urosome 

 spines not accompanied by setae. Uropod 1, peduncle longer than 



