570 MRS. E. W. SEXTON ON THE 



Inferior Antenna, $ . — 3rd joint short and broad, with 2 sensory- 

 spines on tlie upper distal angle ; 4th joint the longest ; flagellum 

 longer than 5th joint, equal to 4th ; 11-jointed in this specimen, 

 each joint with a. cluster on either distal angle of setiform spines 

 and very long seta^. 



Loioer Lip, 9 , outei' lobes rounded, densely setose ; inner lobes 

 coalesced, large, distally narrowed. 



Mandible, $ : cittting-plate on the right side produced below, 

 mai'gin divided into 4 I'ounded teeth, the lowest the largest ; 

 accessory-plate much as in pectinatus, tapering from the base to 

 the long acute tip, with 2 very minute teeth above ; 1 7 spines in 

 the spine-row, the first 4 large, the last 2 vexy small. Molar 

 prominent ; crown reniform in shape, edged with strong teeth, 

 and carrying a small accessory pi'ocess on the side nearest 

 the cutting-plate. Palp : 2nd joint longer than 1st ; 3rd 

 the longest, curved, falciform, attenuated distally, and armed as 

 in the type species with 4 long stitt' curved bristles apically, 

 2 dense rows of similar shorter bristles on the inner margin, 

 and about 4 clusters on the outer margin. The left mandible 

 was broken. 



Maxilla, 1 $ , much as in the type species ; outer plate in one 

 maxilla with 1 1 strong spines, 3 dentate ones at the upper angle, 

 and the others set in pairs, 1 bifurcate and 1 dentate together ; 

 in the other maxilla thei'e were 12 spines. 



Maxilla, 1 $ , as in pilosus; inner plate narrowed distally. 



Maxillipeds, 5 ? covered with numerous long setaj. The basal 

 joints, and the 1st joint of the palp, on the outer side carry 

 fan-shaped groups of exceedingly long plumose setae ; the outer 

 side of the 2nd joint of the palp is also covered with them, and 

 cai'ries in addition a fringe along the inner margin. Outer plate 

 expanded distally, densely fi'inged on the inner margin with 

 slender spines, the apical ones of great length. Inner plate 

 elongate, tapering distally to the nari'ow truncate apex ; 3 flat 

 spines are inset in the apex, almost hidden by the plumose setae 

 surrounding them ; the outer margin is furnished with a row of 

 about 10 simple setiform spines, and the inner carries a row of 

 18-20 ver}^ long, flexible, plumose sette. The 2nd joint of the 

 palp much the longest, much wider and about twice as long as 

 the 3rd ; the 3rd pi'oduced over the 4th as in the type species ; 

 4th small, tipped with sti'ong serrate spines. 



First Gnathopod, $ . — 5th joint veiy long, provided on the 

 posterior margin with transverse rows of feathered setae, and 

 the clusters of stiff" serrate bristles found in all the species of 

 the genus ; 6th joint subequal to the 5th in length, as described 

 by Stebbing ; palmar margin convex, serrate. On the outer side, 

 extending from the angle nearly to the middle of the palm, is a 

 o-raduated row of bristles, 7 in number, similar in structure to 

 tliose of the type species ; a row of smallei' bristles is inset 

 submarginally along the palm. On the inner side, at the palmar 

 angle, is a short, very broad, sensory spine, and a submarginal 



