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MEMOIRS OF THE QUEENSLAND MUSEUM. 
where they are slightly more numerous. Behind the ocular margin there is a small, 
depressed keel, without an anterior spiny point, and behind this a small tubercle. 
This sculpturing is relatively less prominent than that figured for A. franklinii, and 
that in our specimens of A. serratus. 
The inter-antennal spine is long and narrow, with three serrations on either 
side. 
The metopic plate is relatively smooth and glabrous, unlike that of A. serratus , 
with a few hairs sparsely clothing the posterior portion. There is a group of about 
twelve tubercles on each lateral border. The oral border consists of a transverse, 
rounded bar, very slightly curved ; the lateral margins are sub-spherical. 
The lateral border of the 1st abdominal segment bears a sharp spine. 
The left lateral border of the 2nd abdominal segment bears four large sharp 
spines, and the right bears five. 
The 3rd to the 5th abdominal segments bear laterally a sharp spine, decreasing 
in size on each segment posteriorly. The 6th segment bears no spines, although on the 
right side there is a small tubercle some distance from the lateral border. 
The exopodite of the uropod has a row of teeth between the hard and 
membranous portions. The endopodite has two spines between the two portions — one 
on the external border and one in the middle line. The telson has two lateral spines. 
The exopodite of the 3rd maxilliped reaches or slightly exceeds the 3rd segment 
of the endopodite. 
The propodus of the chelipeds is serrated internally and externally. The 
biting edges of the propodus and the dactylus bear rows of tubercles, some of which 
are greatly enlarged. The upper surface of the carpus is smooth and tumid, with only 
a faint trace of a median suture. On the under surface, there is a transverse row of 
three large spines, extending from near the anterior margin to the middle of another 
row of spines (three on the right cheliped, four on the left) on the inner margin. There 
are two smaller spines on the outer margin. The merus is armed on the upper margin 
with a row of spines ; on the under margin there are two rows — an interior row of seven 
or eight spines, and an exterior row of three larger spines. The ischium is provided 
with a few small spines on the under margin. 
The 1st walking leg has one spine on the anterior border at the distal end. 
This is absent on the left leg. Each of the 2nd pair of walking legs bears a single spine 
on the posterior border at the proximal end. On the two posterior pairs the spines 
are much more numerous. 
Colour in spirits . — General colour of head, dorsal portion of thorax and 
abdomen, and of the chelipeds, dull bluish-green ; the antennae and antennules 
Congo pink ; the membranous portion of the tail-fan, darker congo pink ; spines on 
