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length of the next three segments added to one-third of the length of the furcal joints. The 

 second and third segments are of nearly equal length. The anal segment is one and one-third 

 times the length of the second segment. The furcal joints are rather long and moderately 

 slender, and are twice as long as the anal segment. The joints are furnished with one outer 

 marginal seta placed near the distal end, and four apical setae (Plate LXVII, fig. 18). 



The antennules are comparatively stout and seven-jointed. The second joint is considerably 

 longer than the others. The third and seventh joints are short (Plate LXVII, fig. 19). 



The antennae are four-jointed. The apex of the fourth joint is furnished with three 

 slender curved claws and three setae. The inner claw is stouter than the other two (Plate 

 LXVII, fig. 20). 



The apex of the mandible is stylet-shaped and is furnished with a simple lamella (Plate 

 LXVII, fig. 21A). 



The maxillae are very short. The apex is furnished with four setae. 



The apex of the first pair of maxillipedes is in the form of a long slender stylet. The 

 upper margin is fringed with fine spines (Plate LXVII, fig. 22). 



The second pair of maxillipedes is prehensile. The basal joint is moderately large and 

 broad. The second and third joints are very narrow. The distal end of the third joint is 

 furnished with two short spines (Plate LXVII, fig. 23). 



The exopodites and endopodites of the first three pairs of feet are three-jointed. The 

 exopodite of the fourth pair of feet is three-jointed. The endopodite is one-jointed and is 

 furnished with two apical spines (Plate LXVII, fig. 24). 



The fifth pair of feet is very small. The apex of each foot is provided with one spine 

 and one seta. 



Male unknown. 



This species can readily be indentified by the short body and comparatively long and 

 slender abdomen, and by the elongate furcal joints. 



Occurrence. — One specimen was found in the washings from dredged invertebrata 

 collected at Station 226, midway between the Lucipara and the Schildpad Islands, from a 

 depth °of 1595 metres. 



2. Psciidanthessius pectinahis nov. sp. Plate LXVIII, figs. 21 — 27. 



Female — length 1,35 mm. 



Seen from above, the body appears elongate and rather narrow. The frontal margin is 

 narrowly rounded. It is almost angular in outline. The fourth segment is produced posteriorly 

 and the distal ends are narrowly rounded. The fifth segment is considerably expandecl at the 

 distal end. 



The abdomen is composed of four segments. The combined length ot the abdomen 

 and furcal joints is contained one and three-fourth times in the total length of the cephalotkorax, 

 from the frontal margin to the distal end of the fifth thoracic segment. The genital segment 

 is comparatively long and is equal to the combined length of the next three segments. The 



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