262 
margin bears a series of small forward directed teeth ; the 
inner margin is divided into two acute lobes and a distal pro- 
minence, the two lobes bear marginal minute denticles ; there 
are also a few spinules near the distal end above; the lower 
surface is nearly smooth. The palm is much compressed, it 
widens considerably from the proximal end ; there is a broad 
ridge on the upper surface which extends to the base of the 
mobile finger ; the inner margin is rather acute, with a small 
tooth near the distal end, besides a terminal one ; the outer 
margin, which is nearly straight for most of its length, bears 
a series of spinules which extend to the end of the immobile 
finger ; there are also a few spinules along with a dense mass 
of hair on the upper surface towards the outer margin ; the 
under surface is nearly smooth. The fingers are very much 
compressed and rather unsymmetrical, meeting their whole 
length with some obscure longitudinal sulcations ; the mobile 
one has a sharp ridge above, which near its distal end shows 
some small denticles, its apex is constricted to a hook, its inner 
surface is excavate. The immobile finger is excavate ; its api- 
cal tooth is unsymmetrically placed. In the adult male the 
chelipeds are very unequal, one is often greater developed, the 
hairs are absent, and the asperities much reduced, the fingers 
do not meet except at their apices, and there is a tooth on 
each near the proximal end of their opposable edges. This 
cheliped takes a strong red colour. 
The carapace of the male is much less hairy. 
The three pairs of ambulatory legs are stout, rather 
rough, witn groups of soft hairs, the propocii have a series of 
spines behind, the dactyli are strong, more than half as long 
as the propodi ; they end m one strong claw, at the base of 
which there is a little tubercle, tipped with a small spine, and 
inwardly from this there are four spines. 
The last pair of legs are very slender and chelate ; they 
reach about half the length of the carapace. 
Dredged by Dr. Verco. Investigator Straits, 20-30 fms. 
Length of carapace, 6 mm. 
Breadth of carapace, 5 mm. 
Length of cheliped, female, 10 mm. 
Length of cheliped, enlarged, male, 16 mm. 
Types in Adelaide Museum. 
Sub-genus Polyonyx, Stimpson. 
Polyon^'x transversus, Has well. PI. xx.wi., Mgs. 2, 2a. 
PorceHdUd fninacerm, Haswell, Cat. Aust. Crust, p. 150. 
The carapace is nearly smooth, much broader than long, 
showing from above a transversely ovate shape, very convex 
in the antero-posterior direction, much less so in the trans- 
