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hairs in their outer part, tip obtusely pointed. Superior antennae exceeding in
length the breadth of the cephalon, 1st joint of the peduncle rather elongated,
Hagellum scarcely longer than that joint, and composed of 3 articulations. Inferior
antenna} but little longer than the superior, and of the structure characteristic of
the genus; flagellum 7-articulate. 1st pair of legs with the carpus strongly dilated
distally, being considerably broader than it is long, and armed inside with 2
strong spines, anteriorly with 2 smaller ones ; propodos oblong oval, exceeding the
carpus in size; dactylus strong, with 2 small denticles inside. Ambulatory legs
about of same structure as in Paramunna lilobata. Middle piece of male oper-
culum likewise rather similar, though comparatively smaller. Uropoda with the
outer ramus extremely small. Colour bright red. Length of adult female 1 !
/a mm.
Remarks. This is the species first recorded, and it may accordingly be
regarded as the type of the genus. It is easily recognized from the other 2
Norwegian species by the peculiar rod-like spines radiating
the fore-part cf the body.
from the sides of
Occurrence. The species occurs along the whole Norwegian coast, from
the Christiania Fjord to Vadso, and is often found in considerable numbers on
a muddy bottom, in depths ranging from 6 to 30 fathoms. It is a rather sluggish
animal, creeping slowly along the bottom, and is often so thickly covered with
muddy particles as only with great difficulty to be discerned. Out of Norway,
it has not yet been recorded.
2. Pleurog'onium inerme,
(Pi. XLVIIt, fig. 1.)
G. 0. Sars.
Pleurogonium inerme, G. O. Sars, Oversigt at' Norges Crustaceer I, p. t>7, PI. 2. fig. 5.
Specific Clutrfirtrrx. Very like the preceding species,
but without a trace
of the rod-like lateral spines characteristic of that form, the lateral parts of the
segments being only obtusely angular. Cephalon somewhat less produced in front,
and almost twice as broad as it is long. Caudal segment comparatively larger
and broader than in the type species, obcordate in form, tip pointed. The
several appendages of the body nearly exactly as in P. rubicundum. Colour pale
greyish, with a very faint reddish tinge. Length of adult female about 2 mm.
Remarks. The present form is so very like the preceding one, that at
first I only regarded it as an accidental variety. Having, however, subsequently
found it in several places, and of pretty constant appearance, I am now of the
opinion that it represents a distinct, though very closely allied species. It is