1 PROCEEDINGS OF THE NATIONAL MUSEUM VOL, 125 
unarmed; telson usually lacking movable submedian teeth; uropodal 
endopod lacking strong proximal fold on outer margin. 
Typr-species.—Lystosquilla inornata Dana, 1852. 
REMARKS.—Four species of Lysiosquilla occur in the Indo-West 
Pacific region. One species, L. capensis Hansen, is known only from 
off South Africa; the other three have wider ranges. Only L. tredecim- 
dentata Holthuis is known to occur off West Pakistan. The commonest 
species in the Indo-West Pacific region, L. maculata (Fabricius), could 
be expected off West Pakistan, but there are no authenticated records 
of that species from the northwestern Indian Ocean. Manning (1968b) 
gave a key to the Indo-West Pacific species. 
2. Lysiosquilla tredecimdentata Holthuis, 1941 
FIGURE 4 
Lystosquilla maculata. —Chopra, 1939, p. 161.—Holthuis, 1967a, p. 40. 
Lysiosquilla maculata var. tredecimdentata Holthuis, 1941, p. 278, fig. 6. 
Lysosquilla maculata.—Baig, 1954, p. 1438 [erroneous spelling]. 
Lysiosquilla maculata tredecimdentata.—Manning, 1963, p. 317 [listed]. 
Lystosquilla maculata maculata.—Ingle, 1963, p. 23 [part; not figs. 23, 45, 61, 72]. 
Lystosqutlla tredecimdentata.— Holthuis, 1967a, p. 23 [references].—Manning, 1968b, 
p. 38, fig. 18. 
MArTeEriAL.—2 9’, 120-259 mm; off Karachi; Central Fisheries Department, 
Karachi. 
Description.—Kye large, cornea bilobed, set obliquely on stalk; 
ocular scales separate, broad, truncate dorsally; anterior margin of 
opthalmic somite produced into a median spine; anterior margin of 
basal segment of antenna with triangular projection (fig. 4a); anten- 
nal scale slender, 3 times as long as wide; rostral plate heart shaped, 
broader than long, with median carina on anterior half; carapace 
smooth, rounded anterolaterally and posterolaterally; raptorial claw 
large, dactylus with 11-12 teeth (13 in holotype); dorsal ridge of 
carpus of claw with deflexed spine; lateral process of fifth thoracic 
somite inconspicuous, lateral processes of next 2 somites flattened 
laterally, rounded anterolaterally, more truncate posterolaterally; 
ventral keel of eighth thoracic somite with acute posterior projection; 
abdominal somites unarmed, smooth, depressed, sixth somite with 
uregular surface laterally; telson much broader than long, with low, 
triangular, median boss, submedian bosses present but less distinct; 
lateral margin of telson pitted; posterolateral margin of telson with 
4 pairs of fixed projections, innermost obtuse, outermost spiniform; 
submedian margin smooth, unarmed, indented along midline; uro- 
podal exopod with 8 movable spines on outer margin of proximal 
segment; inner spine of basal prolongation of uropod much the longer. 
