276 Part III—Twenty-second Annual Report 
joints, is about 1‘1mm.(about 51, of an inch), but that represented by figure 
2 is slightly larger, and measures about 1-4mm. The segments, especially 
along their dorsal aspect, are rough with minute scattered spines. The 
body is slender, as in the species previously described, but the fourth and 
fifth segments are rather more dilated than the others. The cephalosome 
is about equal in length to that of the first two segments of the metasome 
combined. The first segment of the metasome is a small one, while the 
next two are each rather longer and stouter than the one immediately 
preceding ; the last segment of the metasome is considerably smaller than 
the third one. The segmentation of the urosome (abdomen) somewhat 
resembles that of Hudactylina similis, A. Scott. 
The antennules, which are short and stout, are apparently five-jointed, 
as in those of the species referred to, and their armature is also similar to 
that of Hudactylina similis, but, on the other hand, there is a distinct 
difference in the proportional lengths of the joints,—the third being longer 
than the second joint and the fourth scarcely twice as long as the ultimate 
one (fig. 3). 
The antenne, which are moderately elongated, have a general resemblance 
in their form and structure to those of the other described species; but the 
second joint, which is about as long as the third, is produced on the inner 
aspect and near the distal end so as to form a single stout and prominent 
spine, and a single powerful hook-like spine with a thickened base carrying 
a few small setz is articulated to the extremity of the third joint (fig. 4). 
The mandibles and maxille do not present any marked difference from 
those of Eudactylina acuta, van Beneden. 
The first maxillipeds, which resemble the same appendages in Hudacty- 
lina similis, arearmed with a moderately stout terminal claw, and the end 
joint is furnished with a row of minute course denticles along the inner 
edge (fig. 5). 
The second maxillipeds are large and strong and form powerful chele; 
they are somewhat similar in structure to those of Hudactylina similis, but 
the extremity of the claw which impinges against the lower spoon-like 
process has the stout apical tooth with a rounded hood-like covering 
fig. 6). 
ria ae first pair of thoracic feet both branches are two-jointed, and both 
are moderately stout; the inner branches are sparingly fringed with minute 
sete, and armed with two apical spines of unequal length; the outer 
branches, which are rather shorter than the inner, are each furnished with 
a fringe of minute sete on the outer margin of the first joint, while the 
end joint bears several spines round its outer margin and apex ; the inner 
spine is of moderate length, but the others are small (fig. 7). 
The structure of the second pair has a general resemblance to that of the 
same pair in Hudactylina similis and HZ. acuta, The inner branches, whi ch 
are distinctly three-jointed, are considerably smaller than the outer ones, 
the first joint bears a longitudinal row of small spines on its inner aspsct, 
while the end joint carries two apical spines of moderate but unequal 
length. The outer branches are stout and elongated, and, like the inner 
ones, appear to consist of three joints, but the articulation between the first 
and second joints is apparently nearly obsolete; two short spines which 
have their bases dilated spring from the outer margin and near the distal 
end of the elongated first joint ; the third joint, which is short and rounded 
at the extremity, is provided with a single and moderately stout subter- 
minal spine, as shown in the drawing (fig. 8). 
The third and fourth pairs are nearly alike, and resemble the same two 
pairs in Hudactylina similis, except that the inner branches are furnished 
with a number of scattered spinules on their outer aspect; the outer 
branches are each of them rounded at the extremity, and provided with 
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