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joints of the chelipedes have three or four granules or spinules on
the posterior, hut none on the anterior margin and the palm is
without either grannies or s p i n u l e s ; the amhu atory legs are much
less dilated and compressed than in Air. Haswell s figure .
From Paratymolus puhescens and P . bituhercidatus th is form, is
distinguished not merely by the different shape and nberculation of
the carapace, bnt also by the shorter eye-pedmicles and second
antennal joint, and by the more dilated last joint of the peduncle
of the antennæ, and the more distinctly opercnliform maxillipedes,
which are altogether of the Alaioid type, with nearly quadrate
merus-joints (see tig. 5). T h e legs also are more robust. Colour
fin spirit) light yellowish brown. Length of carapace of an adult
female with ova nearly 3 i lines (7 millim ), greatest breadth nearly
3 lines (6 millim.) ; length of chelipede about 3g lines (/ miUim.), of
second ambulatory leg about 5 lines (11 miUim.).
Three specimens (females) are in the collection from Friday Island,
10 fms (Xo 153) The distinctions between the two torms above
enumerated are, I think, too marked to be due to sex. The sex of
Air. Haswcll’s types from Port Denison and Port Jackson is not
stated, but the figure of the postahdomen nearly resembles th at of
our adult female P. sexspinosus.
5. Diogenes rectimanus. ( P l a t e XXYII. tig. C.)
The carapace is depressed, w ith the sides in front of the^ branchial
rerions uneven and with a few h airs; the lateral margins armed
with three or four spinules; the frontal margin broadly sinuated
with scarcely any trace of a median prominence, hut with distinct
lateral spinules, situated between the ^ases of the eye-pednncles and
antennæ: the branchial regions are hut little dilated, the rostral
scale is linear, acute, and reaches nearly to the apices of the ophthalmic'scales,
which are broadly ovate, with three or four minute
denticnles at their distal ends. The postabdomen is clothed with
lonrish hairs, and has four filamentous appendages on its left side,
its fifth and sixth segments are protected by dorsal calcareous plates ;
the terminal segment is slightly transverse, divided by a median
notch into two rounded lobes, which are ciliated and spinulose on
the maro-ins. The eye-jieduncles are nearly as long as the transverse
width of the frontal margin of the carapace, much shorter than the
antennal peduncles, with the corneæ not dilated. The penultimate
joint of the peduncle of the slender antennules reaches jn st beyond
the apex of the eye-peduncles ; the antepenultimate joint ot the
nednncle of the antennæ is prolonged into a spine, which reaches
nearly to the apex of the following joint ; this spine is am e d on its
inner margin with a series of smaller spinules, and there is a smaller
spine on its outer side at base ; the terminal peduncular joint reaches
beyond the eye-pednncles; the joints of the fiagella are fringed
below with long fiexible hairs. The outer and lower margin of the
» Ann. & Mag. Nat. Hist. ser. 5, v. p. 303, pi. xvi. figs. 3-5 (1880).
263
trigonous merus-joint of the larger (left) chelipede is armed with
three or four spinules at its distal extremity : the carpus is but
little shorter than the palm and granulated externally, the granules
on the upper margin increasing in size to the distal end, where they
are spinuliform : the palm also is externally granulated and pubescent
; the lower margin is in a straight line with the lower margin
of the immobile finger, and is armed with several much larger acute
spinules; a few somewhat large granules exist also at the base of the
palm, and others are arranged in a longitudinal series along the outer
surface parallel to the upper margin, and also along the upper margin
of the palm and of the dactyl, which is about as long as the palm, fiattened
externally, and fitting closely against the lower finger, having
on its inner margin near the base a rounded lobe, which is received
into a corresponding cavity in the inner margin of the lower finger.
The smaller chelipede has the slender wrist and hand clothed with
yellowish hairs ; the wrist armed above with small spinules arranged
in two longitudinal series. The second and third ambulatory legs are
slender and thinly pubescent, with the dactyli arcuated and rather
longer than the foregoing joints. The fourth and fifth legs are suh-
chelate, the small dactyl impinging against the broad spongy pad
which terminates the penultimate joint. The filamentary ajipendages
of the postahdomen are clothed with long hairs. The left uropod only
is perfect ; it has the inner ramus larger than the outer. The colour
is whitish, with faint indications of pink upon the legs. Length of
the carapace about 4 lines (nearly 9 millim.), of the left chelipede
about 9 lines (19 millim.), of the third ambulatory leg about I I lines
(23 millim.).
The single example in Dr. Coppinger’s coUection is from Prince
of AVales Channel, 7 fms. (Xo. 169).
This species scarcely differs from D. spinulimanus, Aliers, except in
the longer slenderer rostrum, denticulated ophthalmic scales, and in
having the lower margin of the immobile finger in a straight line
with the lower margin of the palm (fig. c), whereas in the typical
D. spimdimanus the lower finger is bent downward and the ophthalmic
scales subeutire. In D. penicillatus the eyes are much
shorter, there is a median rostral spine, and the left chela has a
double series of sjiinules above.
I t may be distinguished from the species of Diogenes included in
Air. Haswell’s Australian 'Catalogue (pp. 156, 157) as follows :—■
From D. miles, Fabr., by the much less spinulose chelipedes and
shorter tarsi of the ambulatory legs; from D. custos, Fabr., by the
narrower, non-denticulated, rostriform appendage ; from D. granulatus,
Aliers, by the very different form and armature of the larger
(left) chelipede, &c. ; and from D. senex, Heller, by the shorter
rostrum and eye-peduncles, which latter do not reach to the end of
the peduncles of the antennae, the different spinulation of the palms
of the chelipedes, &c.
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