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exceeding in length the other 2 combined, terminal joint longer than the penul-
timate one; those in male attaining almost y3 of the length of the body, 1st
joint of the flagellum very short, discoidal and, like the 2 succeeding joints, having
a dense bunch of olfactory filaments. Chelipeds in female somewhat tapering
distally, hand a little longer than the carpus, and oblong oval in form,
with the
fingers much shorter than the palm; those in male slightly differing, the hand
being conspicuously dilated in the middle. Uropoda about the length of the
lust 2 segments of metasome combined,
outer ramus a little shorter and narrower
than the inner, joints of the rami of equal length. Length of adult female 1.60
mm.,
of male 0.90 mm.
Remarks. This form was first recorded by Sp. Bate, but was errone-
ously identified by him with Tanais forcipatus Lilljeborg, which belongs
very different genus. It was therefore necessary to change the specific name,
and in 1880 I proposed for the species the, name of P. Bedel. From the type
species, P. elongatus Dana, it is easily distinguished by
to a
its much less slender
form, the male especially exhibiting quite an unusually short and thick body.
Occurrence. I have met with this form in several places on the west
coast of Norway, in comparatively shallow water among
the roots of Laminarise.
The males, as usual, are far less numerous than the females and, on the whole,
look so very different, that they may easily be mistaken for quite a different
species. As however, they, were found in company with the females, and
no other Tanaid occurred in these places, their true relation could with certainty
be affirmed.
Distribution. "British Isles (Sp. Bate), Mediterranean at Spezia (the author).
Gen. 3. TyphlOtanaiS, G. O. Sars, 1880
Generic Characters.
- -
Body in female more or less elongated, sub-depressed,
linear, with the lateral contours almost straight; that of male comparatively shorter
and constricted in the middle. Cephalosome of moderate size, narrowly truncated
in front, or slightly produced in the middle,
with no traces of ocular lobes.
1st free segment of mesosome generally much shorter than the others. Me-
tasome normal. Eyes wholly absent. Superior antenme in female conically
attenuated, 3-articulate, with the middle joint small,
the terminal one narrow
and elongated; those in male much larger and of a similar structure to that in
*& i
3 Crustacea.