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amounting to about 14 in all. Only a single species is as yet found off the
coast of Norway.
Apseudes spinosus,
(PI. I & II.)
M. Bars.
BJtoea splnosa, M. Sars, Oversigt over de i den Norsk-arktiske Region forekominende Krebsdyr.
Specific
Cbristiania Vid. Selsk. Forb. f. 1858, p. 30.
Characters. - -
Syn: Apseudes talpa, Lilljeb. (not Mont,).
Body very slender and elongated, gradually tapering
behind. Cephalosome distinctly areolated above, with a slight notch on each side
in front of the middle, rostral plate cordiform, defined on each side by a distinct
notch, and terminating in an acute, somewhat deflexed point. Ocular lobes well-
defined, outer part slightly tumefied, and armed anteriorly with a short pointed
prominence. Free segments of inesosome defined by deep constrictions, and having
the upper face slightly tubercular. 1st pair of coxal plates of moderate size,
spiniform, and pointing obliquely outwards,
the others rather small and rounded.
Antero-lateral corners of the 5 posterior segments produced to triangularly pointed,
setiferous projections. Metasome very narrow, with the epimera of the 5 anterior
segments produced to spiniform projections densely clothed with long ciliated
bristles, terminal segment narrow and elongated, equalling in length
combined, subcylindrical in form and furnished laterally
the other 5
with numerous small
setiferous nodules. Eyes imperfectly developed, with opaque whitish pigment and
devoid of any distinct visual elements. Superior antennae rather elongated, 1st
joint of the peduncle attenuated distally and finely serrated in the proximal half
of the inner edge, flagellum fully as long as the peduncle and 16 20-articulate,
accessory appendage about half as long,
and 8 9-articulate. Inferior antennae
with the flagellum longer than the peduncle. Chelipeds in female rather robust,
scarcely smaller than the fossorial legs, basal joint fusiform, with a strong denti-
form projection on the posterior edge beyond the middle, hand much larger than
the carpus, oblong ovate in form, thumb with a distinct tubercle in the middle
of the inner edge; those in male with the hand very large and tumid, both the
thumb and the dactylus strongly tubercular inside. Uropoda very much elongated,
attaining almost half the length of the body, inner ramus composed
of about 30
articulations, outer ramus scarcely Ys as long and 1 2-articulate. Colour whitish.
Length reaching to 13 mm.
Remarks. - - The present species was briefly described by my late father
in the year 1858 as Rhwa spinosa, but was subsequently, by most authors, identi-