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31. Family CANTHOCAMPTIDAE. 
Genus Ameira Boeck, 1864. 
The members of this genus can be distinguished by the long slender antennules, by 
the long slender three-jointed endopodite of the first pair of feet, by the much shorter three- 
jointed exopodite, and by the perfectly smooth anal operculum. 
One species apparently belonging to this genus as re-defined by Sars in ‘Crustacea of 
Norway’ Vol. V, was obtained from the plankton collected by the ‘Siboga’ in the Malay Archipelago. 
1. Ameiva stbogae nov. sp. Plate LX, figs. 1—7. 
Female — length .43 mm. 
Seen from the side, the body appears moderately slender and rather cylindrical. The 
cephalic segment is large and is nearly as long as the combined length of the first three thoracic 
segments. The rostrum is small and inconspicuous. 
The abdomen is composed of four segments. The genital segment is comparatively large 
and is equal to the combined length of the second and third segments. It is traversed by a 
well defined suture. The anal segment is short. The operculum is very small and is perfectly 
smooth. The furcal joints are short. The joints are as long as broad and are equal to about 
half the length of the anal segment (Plate LX, fig. 7). 
The antennules are long and slender and are composed of eight joints. The last joint 
is distinctly smaller than the others. The fourth joint is furnished with a long sensory filament. 
The antennae are very small. The exopodite appears to be indistinctly two-jointed (Plate 
JUL, ie, 2). 
The mandibles, maxillae and maxillipedes are nearly similar to those of Amezra 
longipes Boeck. 
The exopodites and endopodites of the four pairs of feet are three-jointed. The endo- 
podite of the first pair of feet is much longer than the exopodite and is distinctly prehensile. 
The first joint is equal to twice the combined length of the second and third joints. The inner 
marginal seta is placed in the distal third of the joint, The last joint is rather narrow and 
linear in shape. It is two and a half times longer than the second joint. The apex is furnished 
with one straight claw and a geniculate seta (Plate LX, fig. 5). 
The fifth pair of feet is of moderate size and two-jointed. The proximal joint is wide 
at the base and only very slightly attenuated towards the apex of the inner expansion. The 
apex bears four moderately long setae. The distal joint is narrow and is somewhat pyriform 
in shape. It is furnished with three outer marginal setae, one apical seta, and one seta at 
the distal end of the inner margin (Plate LX, fig. 6). 
Male unknown. 
This species can readily be distinguished by its very small size, by the proportional 
length of the joints of the endopodite of the first pair of feet, and by the shape and armature 
of the fifth pair. 
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