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101
with Jni/ir/i, ;nul it is therefore somewhat questionable, whether it can in reality
be maintained. As, however, there are at least 3 species, which closely agree in
the distinguishing characters recorded by Dr. Bovallius for his genus, 1 am un-
willing at present to reject it,
lanthe laciniata,
(PL XLI.)
G. 0. Sars.
Ifinira laciniata, G. 0. Sars, Bidrag til Kundskaben oni Dyrelivet pan vore Havbanker,
Chr. Vid. Selsk. Forli 1872, p. 92.
Specific Characters. Body much flattened, oval in form, being scarcely
twice as long as it is broad. Cephalon provided with a long, spiniform, somewhat
upturned rostrum, lateral parts each produced to a strong lanceolate lappet point-
ing obliquely anteriorly. Segments of mesosome with the lateral parts laminarly
expanded, and each produced into 2 lanceolate lappets separated by a deep incision,
those of the 4 anterior segments subequal, those of the 3 posterior
ones rather
unequal, the anterior lappet being much the larger. Caudal segment much broader
than it is long, gradually widening behind, and produced at the end, on each
side, to an acute triangular expansion, median prominence blunted, all the lappets
finely serrated at the edges, and, like the dorsal face,
clothed with scattered hairs.
Eyes comparatively small, rounded. Superior antennae reaching somewhat beyond
the penultimate peduncular joint of the inferior ones, flagellum about twice the
length of the peduncle, and composed of 20 30 articulations. Inferior antennae
scarcely longer than the body, squamiform appendage of the peduncle distinctly
developed, flagellum not quite twice as long as the peduncle. Legs almost exactly
as in lanira maculosa, except that one of the dactylar unguiculi is much smaller
than the other 2, and somewhat remote from the tip of the dactylus. Middle
piece of male operculum very slightly expanded at the end, which is irregularly
serrulated, with a small hamiform projection on each side. Uropoda fully as long
as the caudal segment, and densely clothed with spiniform bristles, inner ramus
scarcely as long as the basal part, outer ramus a little shorter, both being narrow
linear in form. Colour pale yellowish white, semipellucid, without any pigmentary
ornament. Length
of adult male 8 mm.
Remarks. This form was first recorded by the present author in 1872
as lanira laciniata. It is nearly allied to the North American species, I. spinosci
Harger, but differs in the greater development of the lateral lacinise, as also in
the shape of the caudal segment.
Occurrence. I first met with this pretty form outside the Storeggen bank,
where 2 specimens were brought up in the dredge from the considerable depth