beyond the rostrum and bear two ilagella, Avhereof ono is considerably
tbickoned and is bijDartito a t its ex tremity; tho antennal
jieduncles arc short, with the last joint longer tlian tho jirocoding ;
their hasal scales 0A"ate, much longer than tho jieduncles, and without
sjiinnles ; rounded and ciliated at tho distal ends ; the ilagolla
aro shorter than tho animal, willi the joints nearly naked ; tho two
last joints of the outer maxillijicdcs aro slender, setose, and together
little longer than tho antejicnnltimatc joint, vdiich, like tho
jireceding, is moderaioly dilated. The anterior legs are slender, with
tho wrist elongated and about twice as long as tho jialin and lingers
taken together; tho second chelipedes, although larger than the jiro-
ceding, are yet slenderer than in many allied forms; tho joints are
Avithout spines ; tho right leg a Axwy little more robust than tho lol't;
tho morus or arm about as long as the iscliium and littlo longer
than the carpns, AA’hieh is rounded aboA'C and beloAA^ and not half as
long as the palm ; the palm is smooth, rounded above and holoAV,
very slightly compressed; the fingers rather more than half tho
length of tho palm, Avith thin inner edges, incurved and acute at the
tips, and each armed Avith a tooth near tho base on the inner margin,
th a t of the dactyl being the la rg e r; in the left clielipede the teeth
are not developed. The three folloAving legs arc slender, unarmed,
aud terminate in a small simjile curved chuv. The uropoda reach a
little beyond the distal end of the terminal postahdominal segment;
their bases are armed aboA'e Avith a spine ; the rami are ovate and
ciliated, the outer a little broader than the inner. Colour (in sjhrit)
light yellowish. Length of the single specimen (a female) about
10 lines (21 millim.), of second chelipede about 7 lines (15 millim.).
The second specimen was found in the interior of a shell of a
species of Pinna, obtained on the coral-reefs at Port Alolle, and
bears ova.
This species in its general appearance and in many details, as in
the edentulous rostrum, ovate antennal scales, and the form of the
chelipedes, hears a striking rcsemhlancc to Ancliistia aurantiaca,
Dana*, from the Fijis, hut differs in the form of tho outer maxillipedes
and of the dactyli of the ambulatory legs, in which it rather
resembles Harpilius. As this is the ouly spirit-specimen, I have
not A-entnred to dissect the buccal organs to ascertain the absence
of a mandibular palpus; but there can, I think, he little doubt th at
this species is rightly jdaced with Harpilius and Anchistia.
There is in the British-AIusenm collection a dried examjrle from
Shark Bay, AA*. Australia (F. M. Rayner, H.Al.S. ‘ H e ra ld ’), which
probably belongs here. This specimen also was found in the interior
of a Pbina-sheU.
Another closely allied species exists in the Aluseum collection,
represented by a single dried specimen from the interior of Tridacna
(H.M.S. ‘Herald’), Avithout precise indication of locality, which
differs in the form of the rostrum (which aj+ears acute in a lateral
view), and in having a sjAine on the anterior margin of the carapace
* U,s. Expl. Exp. xiii. Or. i. p. 581, pi. xxxviii. fig. 2 (1852).
above tho scale of tho external antennæ, which is armed with a
sjaíiiuIo at its antero-external angle. Tliis 1 jiroposc to dosignato
JI. s'/mmliferus.
13. Anchistia petitthouarsi, Audouin ?
The caraj)acc, with its rostrum, is shaped nearly as in Paloemon ;
tho tormina.1 jiostabdominal segment is narrow, Avith four sjiines on
its ujApor surface, jdacod close to tho lateral margins, and terminates
iu two long mohilo spines and three smaller sjhnes. Tlicre is a
supraorbital spinule situated on each side of tlio rostrum, between
it and the eyes and ju st behind tlic anterior margin of the carapace,
also an antennal spine outside of the eyes, and one (the brancldo-
stegal?) placed below tlio eyes and behind the anterior margin.
Tho rostrum is longer than the peduncles of the antennæ, nearly
straiglit, has six teeth on its upper and four on its lower margin,
arid is bidentate a t ajiex ; the last tootli of the scries is situated in
the median dorsal line of rlie carapace behind the anterior margin.
The eyes are, as in Leander, of moderate size and project laterally.
The antennules have tlio antejicimltimatc (?) joint of the peduncles
dilated, laminate, and vertically comjiressed, Avith a small spinule
at its antero-external angle ; the two folioAving joints are short and
slender and terminate in two flagella, of Avhich tlie thicker is shortly
bifid at its apex, the other is broken. The antennal scale is much
elongated, narrow, nearly reaching to the apex of the thicker an-
tcnnulary flagellum, and completely concealing (in a dorsal view)
the peduncles of the antennæ ; it is ciliated on its inner margin and
at its ajiex, and has a spinule at its antero-internal angle ; the antennal
flagellum is about as long as the animal. Tlie outer maxillipedes
are suhpcdiform, with the antepenultimate but little thicker
than the last two joints, the penultimate longer than the last joint.
The anterior legs (or chelipedes) are very slender, Avith tho Avrist as
long as the palm and fingers together ; the second legs are slender,
h u t thicker than tho preceding ; merus-joint Avith a small spine at
the distal end of its inferior margin ; tho wrist, which is little
longer than the palm, is also armed with a spine at its distal extremity
; the palm is very slender, nearly terete, and about as long
as the fingers ; these latter are Avithout teeth on the inner margins,
and have the tips slightly incurv'ed. The ambulatory legs are
slender and clothed with a fcAV distant hairs ; the penultimate
joints vory long ; the dactyli slender, styliform, nearly straight, and
not half as long as the preceding joints. The bases of the uropoda
have a small spinule at the distal end of the outer m argin, and there
are two subterminal spinules on the outer margin of each outer
ramus ; the rami are suhovate (as usual) and ciliated at the distal
extremity and along the inner margins ; the outer somewhat broader
than the inner ramus. Colour (iu sjAirit) whitish. Length nearly
10 lines (21 millim.).
The unique specimen (a female with ova) was obtained at Port
Alolle on the beach (No. 98).
il i. ‘
I ! U
t :
t i
i !*
-i '' ii 'I .
■f ■
i
) (
‘ I
3
»1
\
■ Î
li ■
* 4Í» 1