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defined along the middle of the dorsal face, the 1st one very narrow, bandlike,
flanking the sides of the cephalon; the succeeding ones forming behind,
to each
side, an obtuse prominence, and sending off laterally a narrow subcylindric prolon-
gation, carrying the corresponding leg. Metasome abruptly twisted to the left,
and gradually tapering distally, terminal piece pronouncedly clavate in form, and
exhibiting near the tip
2 small rounded tuberosities as the rudiments of the uro-
poda. Lamellae of pleopoda subequal, rounded oval in form. Body of young
female rather unlike that of the fully grown one, anterior division perfectly symmetrical
and rather broad, flattened above, with the lateral edges of mesosome
forming a continuous line, slightly insinuated between each segment ; legs project-
ing laterally. Metasome turned more or less to the left, and somewhat shorter
than the preceding part of the body, pleopoda more regularly arranged. - -
Body
of still younger female (1st postlarral stage) almost perfectly symmetrical through-
out, sub-pyriform in outline, anterior division rounded oval, with the dorsal
face convex, the ventral concave, cephalon freely projected in front, lateral edges
of mesosome curving below, legs folded in beneath the ventral face; metasome
extended nearly in the axis of the body, and having the inner lamella of the pleo-
poda rudimentary. Adult male narrow, sublinear, with the segments
of meso-
some very sharply denned, their lateral parts being separated by deep incisions,
metasome forming an undivided, narrow, sub-cylindric piece. Colour of female
whitish. Length of fully grown female 11 mm.,
of male 3 mm.
Remarks. This is the first recorded species, and may accordingly be
regarded as the type of the genus. It was described in the year 1843 by H.
Rathke as Phryxus paguri. The Bopyrus limlt/tnli of Kroyer, figured, but not
described, in Gaimard's work, seems to be an immature specimen of this spe-
cies, and this is also undoubtedly the case with Phryxus fnstiettudatus Sp. Bate
and Westwood. The Athelge fulludc of Hesse is regarded by Messrs. 8p. Bate
and Westwood as identical with Kathke's species, and I am also inclined to be-
lieve that the Prosthcte cannelee of the same author is nothing but an immature
specimen of this species.
Occurrence. -
Kathke
found 3 specimens of this form off the west coast
of Norway (probably at Christiansund), on Eupagurus beri/linr