1 IS AMI'llirODA NORMALIA. 



superior iiulcuiuc six- or .seven -jointed, shorter than the peduncle ; 

 appcuidage veiy short, two- or three-jointed. Carpus of second and 

 tliird paii'8 of pereiopoda nodulose along the inner side, this side 

 somewhat arcuato. 

 *• Leni;th ',-i linos. 



" Hal). Sooloo Sea, with U. rostratiis." — Dana. 



6. XJrothoe rostratus. (Plate XX. fig. -i.) 

 Urotlioe rostratus, Dana, U.S. Exphr. Expeih p. 921. pi. 62. fig. 5. 



" Cephalon lamellately produced, even to the apex of the first joint of 

 the pedimcle of the superior antennas. Eyes round. First joint of 

 suiiorior antennte rather stout, oblong ; second joint more slender 

 and a little shorter. Inferior paii- longer than half the body ; 

 penidtimate joint of peduncle towards apex fmniished Avith stout 

 reversed setoc ; flagcllum very slender ; joints long. Gnathopoda 

 snbequal; propoda a little oblong, obliquely truncate, at apex. 

 First and second pairs of pereiopoda hardly prehensile ; propodos 

 and carpus fm-nished with stout seta? somewhat like fingers. Fifth 

 pair of pereiopoda quite short, much shorter than the fonxth. 



*' Length 3 lines. 



'^ Hah. Sooloo Sea, Feb. 1842."— /Arw(. 



30. LILJEBORGIA, n. g. 



Cephalon not much produced. Pereion long, slender, and compressed. 

 Inferior antennse longer than the superior. Coxae not deeper than 

 their respective segments. Gnathopoda resembling each other in 

 form ; second pair larger than the first, subchelate ; carpus con- 

 tinnoxis with the propodos, and produced anteriorly along its infe- 

 rior margin. Pereiopoda having the dactyla styliform. Posterior 

 pair of pleopoda biramoiis, Telson single, entire. 



This genus is disting-uished from Urothoe by the large gnathopoda, 

 small coxa?, and the form of the telson. It is named in compliment to 

 Prof. LUjeborg. 



1. Liljeborgia pallida. (Plate XX. fig. 5.) B.M. 



G iuumavus pallidas, Spence Bate, Brit. Assoc. RepoH, 1855 ; Si/iiopsis, 

 &-C., Ann. Nat. Hist. Feb. 1857. 



Pleon having a minute dorsal tooth upon the first, second, and fourth 

 segments ; the posterior margin of the thii'd segment excavate 

 near the infero-postorior angle, which is produced into a sharp 

 tooth. Eyes large, circular, black. Superior antennae shorter than 

 tli« peduncle of the inferior ; flagcUum as long as the peduncle ; 



