422 PROCEEDINGS OF THE NATIONAL MUSEUM vol. lis 



margin with stout pectinate spine-teeth; second joint of palp longest, 

 bearing many long curved spines on inner margin; third joint of palp 

 expanding distally, provided with many long curved spines, some of 

 which are pectinate (fig. 13); fom^th joint of palp nearly as long as 

 third, bearing long slender naU. 



Gnathopods differing little in length, but gnathopod 2 slightly 

 the longer. Gnathopod 1 slightly stouter than 2; second joint slightly 

 longer than sixth joint; fifth joint slightly shorter than sixth and almost 

 as wide; sixth joint % as wide as long, palm quite oblique, curving 

 gradually into hind margin of joint, armed on outer margin with row of 

 7-8 blunt, peglike teeth which extend slight way down hind margin of 

 joint and on inside of palm with at least twice as many blunt teeth; 

 seventh joint strong, much cm'ved, bearing nail which occupies about 

 % of joint. Gnathopod 2, second joint longer than sixth; fifth joint 

 nearly as long and as wide as sixth ; sixth about % as wide as long, palm 

 not as oblique as in gnathopod 1, passing into hind margin of joint by 

 short curve, armed on outside margin with 7 blunt teeth which extend 

 sHght way down hind margin of joint; seventh joint not as strongly 

 arched as that of gnathopod 1, nail occupying about ji of its length. 



Pereopod 1 slightly stouter and considerably longer than pereopod 2. 

 Pereopod 2 rather stout (fig. lOi); seventh joint short, strong, with 

 upward-ciu-ving nail, Pereopod 3 much like pereopod 4 but shorter, 

 its coxal plate larger (fig. ISj). Pereopod 5 longest (fig. 13^). 



Seventh pereon segment and pleon segments as shown in figure 136, 

 obtusely angular posterodorsally, each having slight hump anteriorly 

 with lower hind corner broadly rounding. First urosome segment has 

 dorsally on either side a slightly raised ridge armed with spines. 

 Second and third urosome segments have dorsally on either side a 

 very slight ridge armed with spines. Pieopods rather long; rami 

 about twice as long as their peduncles and equal in length. Uropods 

 1 and 2 extending back about same distance; uropod 3 extending back 

 much farther. Their armature of spines shown by figure 136. 

 Uropod 3, outer 1 -jointed ramus about 3K times longer than 

 peduncle; inner ramus only about ji as long as outer ramus (fig. 131). 



Telson reaching to end of peduncle of lu-opod 3, about as long as 

 broad, cleft about % its length, lobes dehiscent, each armed apically 

 with spine and several plumose setae (fig. 13m). Gnathopod 2 and 

 pereopods 1-5 carrying branchiae, which are broadly oval and have 

 small sausage-shaped appendage. Length of male about 16 mm. 



Female. — Very much like male but smaller. Gnathopods smaller, 

 weaker. Gnathopod 1, palm very oblique, without defining angle but 

 with 4 straight sharp spines on outside, where it curves into hind 

 margin of joint, and 4 on inside of palm; seventh joint not as strongly 

 arched, nail long, slender, bearing forward-pointing tooth at its base 



