GAMMARIDEA. 921 



The very small inner lamellar processes of the maxillipeds remove 

 this genus widely from the other Lysianassinae and ally them to the 

 Leucothoinae ; yet the mandibles are of the Lysianassa type. The 

 superior antennae have the base considerably elongated, yet the first 

 joint is rather stout. The large and long foliaceous posterior stylets 

 distinguish the species readily from related genera. The feet of the 

 second and third pairs, although not properly prehensile, are furnished 

 with very stout finger-like spines on the penult and ante-penult joints ; 

 and the species have thus some relation to the Pontoporeince. 



The caudal stylets of the first and second pairs have the branches 

 straight subulate and naked. The caudal segment of the abdomen is 

 elongate, and bisected longitudinally very nearly to its base. The six 

 posterior legs are broad lamellar, especially the first, third, and fourth 

 joints. The first and second pairs are similar to one another, and the 

 hands are well made for prehension, although rather small. 



Urothoe rostratus. 



Frons portentosb productus et lamellatus, apicem articuli anUnnarum 

 \marum lmi attmgens. Ocidi rotundati. Articidus anUnnarum 

 \marum lmus crassior, oblongus, 2dus paulo brevior, gracilior, fla- 

 gello 12-articidato, appendice S-articulato. Antenna? 2dcs dimidio cor- 

 poris longiores, articxdo basi penultimo setis crassis r ever sis armatis, 

 fiagello gracillimo, articidis longis. Pedes lnti 2diqiie subasqui, rnanu 

 paido oblong a, apice oblique truncatd. Pedes 3tii Clique vix prehensilea, 

 articulis pemdtimo et antepenvMirno setis crassis fere digitiformibus 

 armato. Pedes lmi fttismulto breviores. Styli caudales 2di breviores. 



Front lamellately produced, even to apex of first joint of base of supe- 

 rior antennae. Eyes round. First joint of superior antennae rather 

 stout, oblong, second joint more slender and a little shorter. Infe- 

 rior pair longer than half the body, penult joint of base towards 

 apex furnished with stout reversed setae, flagellum very slender, 

 joints long. Feet of first and second pairs subequal, hand a little 

 oblong, obliquely truncate at apex. Feet of third and fourth pairs 

 hardly prehensile, the penult and antepenult joint furnished with 

 stout setae a little like fingers. Feet of seventh pair quite short ; 

 much shorter than those of the sixth. 



231 



