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Inferior antenna?, as compared with those in the other known species, of incon-
siderable length, scarcely as long- as the body, rlagellum not attaining the Jength
of the peduncle. 1st pair of legs in female of the usual structure, in male con-
siderably stronger, with the carpus considerably expanded, and produced at the
end inside to an acute thumb-like projection, the inner edge of the joint densely
setiferous. Ambulatory legs
in both sexes shorter and stouter than usual, last
pair scarcely exceeding in length the anterior division of the body. Uropoda
produced at the tip into several dentiform projections, one of which 'assumes a
hook-like appearance. Colour pale yellowish, slightly mottled with light brown.
Length
of adult female about 3 mm.
Remarks. This form was h'rst described by Goodsir from male specimens.
The female was subsequently recorded by Sp. Bate and Westwood as a new species
under the name of J/. Whltcana. Kroyer confounded the species with his M.
Fabricii, a fact wJiicli may easily be proved on examining the several figures he
gives in the work of Gaimard. Indeed, the greater number of these figures
evidently belongs to the present species, and not to M. fahricii. The present
form may be easily distinguished from any of the preceding species by the com-
paratively short and stout inferior antenna? and legs, as also by the peculiar
structure of the uropoda. The caudal segment, moreover, differs both in shape
and armature from that in the said species.
Occurrence. I have found this form occasionally off the south and west
coasts of Norway, in comparatively shallow water.
Distribution. British Isles (Goodsir, Sp. Bate), Kattegat (Kroyer)?.
5. Munna palmata, Lilljeborg.
(PI. XLVl, fig. 2.)
MHIIIKI pnhnnta, Lilljeborg, Ofvers. Vetensk. Akad. F