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253
uropoda, by which the 2 genera may be easily distinguished,
and for this reason
I have it thought right to retain the genus of Prof. Meinert, though I must allow
that it is far from being a well defined one.
Occurrence. This form was taken during the Danish Expedition in
4 different places, 3 of which lie in the Skagerak, NE of the Skagen light-house,
the 4th in the Kattegat. It has not yet been found off the Norwegian coast;
but I regard it as very probable that, on a closer investigation, it will be found
to occur there, at least off the southern part of the country.
Eugerda eoarctata (Hansen).
(Suppl. PI. in, fig. 2, PI. IV, fig. 3).
Desmosoma coarctatum, Hansen, MS.
Specific Charaters. Body of female not very slender,
with the anterior
and posterior divisions of the body of about equal length. Cephalon rather
large, with the frontal edge evenly rounded. The 3 anterior segments
of meso-
some of about same size and appearance, having the lateral parts curved anteriorly
and terminating in an obtuse point; 4th segment considerably broader in front
than behind and transversely truncated at the extremity; 5th segment rather
broad, irregularly quadrangular in shape, and very distinctly
contracted in the
middle, anterior corners obtusely produced. Caudal segment oval in form, and
distinctly notched on each side of the obtusely rounded extremity, the notch being
defined in front by a tooth-like projection. 1st pair of legs very strongly built,
with the joints considerably dilated, meral joint with 2, carpal joint with 3 strong
spines inside, propodos oblong oval, finely denticulate inside; the 3 succeeding
pairs more slender, and successively decreasing in size, carpal joint with a restricted
number of spiniform bristles arranged in a double row, propodal one rather narrow,
dactylus comparatively strong. The 3 posterior pairs of legs, as in E. globiceps,
imperfectly natatory. Uropoda with the outer ramus very small, though well
defined. Male resembling in outward appearance the female, and, like the latter,
having the frontal part of the cephalon evenly rounded ; posterior
section of meso-
some scarcely more fully developed than in the female, its 1st segment being
even somewhat narrower, with the anterior corners less produced. Length of
female 2 mm., of male iVs nim.
Remarks. This species is easily distinguishable from the preceding one
by the fuller development of the 1st segment of the mesosome, and by the different
form of the 4th and 5th segments, as also by the distinct notches occurring at