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narrower than the inner, both articulations equal in size. Body
in female
whitish, semipellucid, each of the segments of the uiesosome having 1 irregular,
juxtaposed patches of a light yellowish colour derived from some opaque matter
lying inside the skin; that of male slightly variegated with a pale brownish pig-
ment. Length of female 2.00 mm.,
of male 1.50 rum.
Remarks. This form, at first sight, looks rather like T. cequiremis
Lilljeborg, to be described below, but is found, on a closer examination, to differ
in the structure of the superior antennae, the posterior pairs of pereiopoda, and
the uropoda. It is also rather inferior in size.
Occurrence. I found this species, many years ago, rather plentifully
in the harbour of Vadso at a depth of 30 fathoms. Male specimens occurred not
infrequently together with the females, and could of course with perfect certainty be
referred to this species. Otherwise it is a matter of great difficulty to refer male
specimens to their respective species, not only because they differ very markedly
from the females, but because they exhibit a perplexing mutual similarity.
Specific Characters. -
4. Typhlotanais aeqviremis (Lilljeborg).
(PL X, fig. 1).
Tanais ceqviremis, Lilljeborg, 1. c. p. 21.
Syn: Tanais depressus, G. O. Sars (oliin).
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9- Body linear, more than 6 times as long as it is
broad, and pronouncedly depressed, with the cephalosome rather short, but little
longer than it is broad. First free segment of mesosonie shorter than the others,
which are rectangular in form. Metasome scarcely longer than the hist 2 seg-
ments of mesosonie combined, and of equal breadth throughout, terminal seg-
ment comparatively short, and obtusely truncated at the tip. Superior antennse
about the length of the cephalosome, conically tapering, basal joint somewhat
longer than the other 2 combined. Chelipeds comparatively strong, hand larger
than usual, attaining the length of the carpus, and oblong oval in form, fingers
about the length of the palm. 1st pair of pereiopoda considerably longer than
the 2 succeeding ones, which are rather small; the 3 posterior pairs very robust.
with the basal joint exceedingly tumefied, and the carpal joint quite smooth, not-
produced inside. Uropoda very short, but little longer than the terminal segment
of the metasome, rami subequal in length, the outer one distinctly bi articulate
and terminating in a rather strong seta, inner ramus uniarticulate, though
so-netimes with a very slight indication of a subdivision beyond the middle.
Length 3.10 mm.