download pdf

68
Remarks. The above diagnosis refers only to the immature animal. In
the adult state, this form was first described, but not figured, by 0. Harger in
the above-quoted paper from a solitary specimen taken north of Cape Cod, from
a depth of 130 fathoms. Subsequently several more specimens were procured, and
some additional remarks on the species, accompanied by a habitus-figure and some
detail-figures, were given by the same author in another paper published in 1883.
It may thereby easily be demonstrated, that the form described by Dr. Bovallius in
the year 1885 as Hocinela Lilljeborgii, is the very same species, and, as, moreover,
it must be regarded as beyond all doubt, that this form only represents a more
advanced stage of the Harponyx pranizoides described in 1882 by the present
author, all these 3 forms ought to be combined into one species,
for which the
name proposed by Harger, being the older one, must be retained. According to the
latter author, the species grows to rather a large size, the largest specimen mea-
suring 44 mm. in length. The specimen described by Dr. Bovallius had a length
of 22 mm.
Occurrence. Only 2 specimens of this form, both very young and exactly
alike both in size and structure, have been examined by me. They
were taken
up by the dredge in 2 different localities of the west coast of Norway, viz., at
Hvitingso and at Bekkervig, the depth ranging
from 80 to 150 fathoms.
Distribution.- Atlantic coast of North America (Harger), coast of Bohus-
lan, on the operculum of a whiting (Bovallius).
Fam. 4. Cirolanidae.
Characters. General habitus not unlike that in the JEyidw, though the
back is much more strongly vaulted, giving the body a more or less semicylindric
form. Cephalon with the front not produced in the middle. Coxal plates well-
defined on all the segments of mesosome except the 1st. Metasome normally
developed, with the terminal segment large, clypeiform, constituting together with
the uropoda a well-developed caudal fan. Eyes not very large,
very unequal, the superior ones being very small, the inferior long
lateral. Antennae
and slender.
Oral parts formed for biting and masticating, and accordingly of more normal
structure than in the ^Egidce. All legs ambulatory in character, though the 3 anterior
pairs may also serve for prehension, and the posterior ones for swimming.