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longer than the preceding part of the body, and almost quadrate
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in form, with
the anterior and posterior corners laminarly expanded, and connected by a lateral.
creimlated crest; dorsal face armed in the middle with 2 very strong juxtaposed
spines, slightly curved in front, and having behind them scattered tubercles, hind
edge raised, and armed with 3 strong tubercles. The 3 posterior segments of
mesosome carinated dorsally, and having laterally scattered tubercles. Metasome
with the proximal segment distinctly carinated dorsally and constricted in the
middle; terminal segment only carinated in its anterior part, and tapering
to an
acute point. Eyes rather large and convex, rounded. Superior antennse with the
nagellum longer than the 2 preceding joints combined, and carrying, in female 2,
in male 3 apical olfactory filaments. Inferior antennse scarcely more than half as
long as the body, Hagellum very small,
with a discontinuous row of denticles in-
side, 1st joint scarcely as long as the other 2 combined, terminal spine nearly
as long as the last joint. Colour greyish brown, with more or less distinct, darker
brown pigmentary ramifications. Length of adult female 6 mm., of male scarcely
more than half that size.
Remarks. This is as yet the only known species of the genus, and may
be easily recognized, at least in the female sex, by the large size and peculiar
shape of the middle segment
of the mesosome.
Occurrence. I have met with this form not infrequently in several places,
both on the south and west coasts of Norway, in depths ranging froir 20 to 30
fathoms, on a muddy bottom covered with decaying alg3.
Distribution. British Isles (Robertson), Mediterranean at Messina and
Spezia (the present author). Skagerak and Kattegat (Meinert).