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largest near the base of the lower (immobile) finger ; fingers brown,
the coloration not extending over the inner or outer surface of the
hands, inner margins rather ohscurelj' but regularly denticulated,
apices acute ; ambulatory legs rather long for a species of the genus.
Length of the carapace of the largest male nearly 11 lines (23 millim.),
breadth 1 inch | line (27 millim.).
There is in Dr. Coppinger’s collection a small female from Warrior
Eeef, Torres Straits, and a yet smaller male from Albany Island,
3 -4 fms. ; also in tho second collection an adult male from Thursday
Island, 3 -4 fms. (No. 177). In the Aluseum collection is
an adult male from Torres Straits (il7r. AlcFarlane). I cannot
identify this species with any of the Australian forms described
by Air. Haswell.
Erom the Pilumnus hleekeri, recently described by me *, whieh
inhabits New Guinea, and which this species somewhat resembles
in external appearance, it is distinguished by the much narrower
fissure of the front, different spinulation of the antero-lateral
margins, and the three spines on the upper surface of the palms of
the chelipedes.
In Pilumnus vestitus, Haswell (Cat. p. 68), from Port Jackson
and Port Stephens, Avhich has the carapace covered with stiff yellow
hairs as in P. pulcher, the surface is not granulated, and the spinulation
of the carapace and chelipedes is different.
55. Pilumnus rufopunctatus, Stimpson.
Three specimens (two males and a female) were obtained at Port
Jackson, 5 -7 fms. (No. 104).
Air. Haswell records it from Port Stephens and AA*estern Port.
I t nearly resembles the following species (P. lanatus), which
occurred with it, hut is distinguished by the granulations of the
chelipedes extending over the whole of the outer surface of the
hand, and the tuberculation of the carapace, which, however, seems
to he a variable character, &c.
Possibly the P. rufopunctatus of Stimpson is itself to be identified
with P. tomentosus of Alilne-Edwards. This is a point which cannot
he satisfactorily determined from the very brief diagnosis of the
latter author.
56. Pilumnus lanatus, Latreille ? (P late XXI. fig. P .)
As the P. lanatus has been only very briefiy described, and the
identification of this species must be regarded as uncertain, I append
the following detailed description :—
In the specimens I thus designate the carapace is moderately
convex, of the usual shape, and, as weU as the legs, is covered with
a short dense brown pubescence, which is absent in great measure
from the inferior surface of the body and from the anterior and
CEUSTACEA. 221
lower surfaces of the hands ; the front is moderately deflexed, and is
divided by a median notch into two rounded lobes ; the antero-lateral
margins are somewhat shorter than the postero-lateral, with only
the three posterior teeth distinct, these are small and spiniform.
The orbits are tuberculated on their margins, but without any dis-
tincc spinules ; the inner suborbital angle is rather prominent. All
the postahdominal segments are distinct in both sexes. The basal
antennal joint apparently does not reach to the fro n t; the merus-
joint of the outer maxillipedes is short and transverse; the chelipedes
in the male have the merus-joint short and trigonous, with a
tooth near the distal end of its upper margin ; carpus and palm
granulated on their outer surface, but the granules for the most
part concealed by the pubescence ; there is a small tuberculiform or
subspiniform tooth on the inner margin of the carpus or wrisf; the
hand (for so small a species) is large, its inner surface naked, smooth,
and polished, and the granulations usually obsolete on the naked
part of the outer surface in the larger chelipede ; the lingers are
chocolate-brown, the coloration not extending over any part of the
palm, and the upper finger has scarcely any traces of teeth on its
inner margin. The ambulatory legs are closely pubescent. Length
of the largest male in the collection a little over 4g lines (10 millim.),
breadth about 6 | lines (14 millim.) ; length of largest chelipede
about 10^ lines (22 millim.).
Ten specimens are in the collection, from Port Jackson, 5 -7 fms.
(No. 104).
Either the right or the left chelipede may he the larger m the
male. Occasionally the granulations of the hands are distinct even
upon the naked part of the outer surface ; there are several females
in the series of very small size, yet hearing ova.
There is in the British-Aluseum collection a specimen from Percy
Island (H.Ai.S. ‘ Herald ’). Possibly also a small male from Tasmania
(B. Gunn) is to be referred here.
Einally, there are in Dr. Coppinger’s collection a series of very
small specimens from Port Denison, 4 fms. (No. I l l ) , of much
paler colour than those collected at Port Jackson, and two from
Port Curtis, 11 fms. (No. 87), which perhaps belong to this species.
This species bears some resemblance to F. hirsutus, Stimpson,
which Air. Haswell records from Port Jackson, but differs (in the
adult at least) in the close brown pubescence, and in having a series of
tubercles or small spines on the carpus (not merus) of the ambulatory
legs. In the specimens from the Japanese or Corean seas referred
to P. hirsutus in the Aluseum collection there is but a single spinule
at the distal end of the carpus of these legs. Pilumnus fissifrons,
Stimpson, from Port Jackson, differs in having the carapace
distinctly areolated and the antero-lateral marginal teeth normally
developed.
I f our specimens should prove to belong to an nndescribed species,
I would propose for them the name of P. humilis.
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