NO. 3666 CRUSTACEA—TIRMIZI AND MANNING 1h 
dorsal ridge of carpus produced into a spine; mandibular palp 3- 
segmented; 5 epipods present; lateral processes of last 3 thoracic 
somites rounded anterolaterally and _ posterolaterally; abdomen 
elongate, depressed, loosely articulated, widest at fourth and fifth 
somites; posterolateral angles of sixth somite produced into sharp 
spines; sixth somite also with ventrally directed process on each 
side in front of articulation of uropods; telson (figs. 3e, f) almost 
twice as broad as long, with 4 pairs of fixed marginal teeth, sub- 
medians movable; 6 submedian denticles present on each side of 
midline, arranged in a transverse row, and 1 fixed denticle present 
between each of the marginal teeth; spines of dorsal surface extending 
to or slightly beyond margin; basal segment of uropod with dorsal 
spine; outer margin of proximal segment of exopod with 6 graded 
movable spines, last extending beyond midlength of distal segment; 
inner spine of basal prolongation of uropod longer and stouter. 
Cotor.—Carapace with 3 more or less distinct bands of dark color 
(fig. 3a), posterolateral angles also dark; rostral plate uniformly dark 
except at base, speckled with darker chromatophores; fifth thoracic 
somite light; last 3 thoracic and first 5 abdominal somites each with 
broad, dark band in middle of segment, median portion of band on 
each somite darker than lateral portions; band on last abdominal 
somite lighter than on remainder of body; telson light; uropod with 
dark proximal patch, exopod with dark spot at articulation of distal 
segment, endopod dark beyond dorsal fold. 
Discussion.—Acanthosquilla acanthocarpus can be distinguished 
from A. multifasciata by several features. In the latter species, the 
two lobes on the dactylus of the claw are not subequal in size, but the 
distal is much larger than the proximal; the submedian denticles of 
the telson are not arranged in a transverse row, as in A. acanthocarpus, 
but in two curved rows; and there are but two pairs of marginal teeth 
on the telson, not four as in the present species. 
Acanthosquilla vicina (Nobili), which has been recorded from the 
Red Sea, differs from both A. acanthocarpus and A. multifasciata in 
having 10-11 teeth on the dactylus of the claw, rather than 5 to 
8, and in having sharp anterolateral angles on the rostral plate. 
DistRIBUTION.—Indo-West Pacific region, from the western Indian 
Ocean and Mogambique to Australia and Indo-Malaya. It has not 
been recorded previously from West Pakistan. 
Lysiosquilla Dana, 1852 
DiaGnosis.—Cornea bilobed; rostral plate cordiform, with apical 
spine; 1 mesial and 2 ventral antennal papillae present; mandibular 
palp present; dorsal surface of telson with at most a low median boss, 
