download pdf

asal one. Inferior antenna with the 2nd joint of the peduncle considerably
dilated. Chelipeds much attenuated, hand very narrow, and not nearly attaining
the length of the carpus, fingers shorter than the palm. 1st pair of pereiopoda
longer than the others; the 2 succeeding pairs comparatively robust,
with Hu-
meral joint dilated distally, triangular in form, and carrying inside a strong spine;
the 3 posterior pairs likewise strongly built, with the basal joint much tumefied.
;iiid the 2 outer joints minutely serrulate on the inner edge. Uropoda attaining
half the length of the metasome,
both rami biarticulate and rather narrow,
especially the outer one, which scarcely exceeds in length the basal joint
of the
inner, and has its terminal joint about twice the length of the basal one. Length
reaching to 4.20 mm.
Remarks. - - This is the largest and finest species of the genus, and may,
moreover, easily be recognized by the strongly attenuated chelipeds and the
structure of the uropoda. It may be regarded as the type of the genus,
Occurrence. I have met with this beautiful form in numerous places
on the Norwegian coast, from the Christiania Fjord up to the Lofoten Isles, in depths
ranging from 50 to 300 fathoms. In some places, for instance in the Cliristiania
Fjord
south of Drdbak. it occurs in considerable numbers on a bottom of loose
muddy ('lay, covered with decaying /ostera. The specimens examined by Prof.
Lilljeborg were procured at Molde. Out of Norway, it has not yet
Specific
2. Typhlotanais mieroeheles,
(PI. VIII, fig. 2.)
lyphlotanais mieroeheles, Or. O. Sara, I. c.
('httntch'rx. -
(I. 0. Sars.
.'ody somewhat more slender than in the pre-
ceding species, being about 7 times as long as it is broad, and having the seg-
ments more sharply marked oil' from each other. Cephalosonie gradually attenu-
ated anteriorly, frontal margin acutely produced in the middle. First free segment
of mesosome rather short and somewhat widening in front; the remaining seg-
ments subquadrate in outline. Metasome scarcely broader than the mesosome, and
having the terminal segment rather short. Superior antenna? comparatively short,
but little exceeding halt' the length of the cephalosome,
conical in form, basal
joint longer than the other 2 combined, terminal joint produced at the tip
1 somewhat inward-pointing denticle. Inferior antenna with
to a
the 2nd joint of the
peduncle less dilated than in the preceding species. Chelipeds rather poorly
developed, hand unusually small and narrow, with the fingers about the length of
the palm. 1st pair of pereiopoda not very different from the 2 succeeding
pairs, though with the dactylus more produced. The 3 posterior pairs less