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2. Euthemisto libellula, Mandt, 1822.
Pl. 46, fig. 90—96.
Syn. 1822. Gammarus libellula. Mandt. Observationes in Histo-
riam naturalem et
Anatomiani comparatam in
itinere groenlandico facte,
p. 32.
1865. Themisto libellula. » A. Goés. «Crustacea Amphipoda
maris Spetsbergiam
alluentis, cum speciebus
aliis arcticis.» Öfvers. af
K. Vet,-Akad. Förhandl.
186-5, N:0 8, p. 17, pl. 41,
fig. 33.
E. Libellula differs from the other species by the carpal
process of the second pair of pereiopoda being longer than the
metacarpus, provided with terminal spine, by the metacarpi of
the third and fourth pairs not longer than carpi, by the exterior
rami of the uropoda being a little shorter than the interior,
and by the large, tongue-shaped telson, equalling a third of
the length of the peduncles af the last pair of uropoda.
Length 20—60 mm.
Hab. The Arctic Sea.
3. Euthemisto bispinosa, A. Boeck, 1870.
Pl. 46, fig. 97—103.
Syn. 1870. Themisto bispinosa. A. Boeck. Crustacea Amphipoda borealia
et arctica, p. 8.
It is characterized by the carinated, serrated dorsal side,
by the carpal process of the second pair of periopoda beiug
shorter than the metacarpus, provided with a terminal spine,
by the irregularly triangular carpi of the third and fourth
pairs being as long as the metacarpi, by the very short exterior
rami of the uropoda, and by the small semicircular telson, not
equalling a fifth of the length of the peduncles of the last pair
of uropoda.
Length 15—30 mm.
Hab. Greenland, Spitzbergen.
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