NO. 8666 CRUSTACEA—TIRMIZI AND MANNING 9 
Key to Genera of LystosQuILLIDAE from West Pakistan 
Dorsal surface of telson with fan-shaped row of 5 spines; rostral plate subquadrate 
(fig. 3a): uropodal endopod with strong proximal fold on outer margin. 
Acanthosquilla 
Dorsal surface of telson unarmed; rostral plate cordiform (fig. 4a); uropodal 
endopod lacking strong proximal fold on outer margin. .... Lysiosquilla 
Holthuis (19672) has compiled synonymies for all known species 
in the family. 
Acanthosquilla Manning, 1963 
DiaGcnosis.—Cornea subglobular; rostral place subquadrate, tri- 
spinous anteriorly or with single apical spine; mesial and ventral 
antennal papillae present; mandibular palp present or absent; dorsal 
surface of telson with fan-shaped row of 5 spines; movable submedian 
marginal teeth present on telson; uropodal endopod with strong 
proximal fold on outer margin. 
Typx-spEciEs.—Lystosquilla multifasciata Wood-Mason, 1895. 
Remarks.—Manning (1968b) gave a key to the five Indo-West 
Pacific species of this genus. In addition to the single species A. 
acanthocarpus (Claus) recorded below from West Pakistan, three of 
the five Indo-West Pacific species are known from the western Indian 
Ocean and might occur off West Pakistan. Acanthosquilia humesi 
Manning is known only from Madagascar, but both A. multifasciata 
(Wood-Mason) and A. vicina (Nobili) were reported from the Red 
Sea by Ingle (1963). 
1. Acanthosquilla acanthocarpus (Claus, 1871) 
Figure 3 
Lysiosquilla acanthocarpus.—Kemp, 1913, p. 120.—Chopra, 1934, p. 30.— 
Tiwari and Biswas, 1952, p. 359.—Barnard, 1962, p. 243. 
Acanthosquilla acanthocarpus.—Holthuis, 1967a, p. 3 [references].—Manning, 
1968b, p. 33 [key].—Chhapgar and Sane, 1968, p. 45 [key]. 
MareErtau.—1 ? , 52mm; Manora Island, Karachi; 17 February 1965; Zoological 
Survey Reg. no. 1912. 
Description.—Eye small, cornea globular, faintly bilobed, slightly 
wider than stalk (fig. 3b); antennal scale elongate; antennal protopod 
with 1 mesial and 1 ventral papilla; rostral plate (fig. 3a) as long as 
broad, subquadrate, with carinate median spine; lateral margins of 
rostral plate feebly sinuous and slightly convergent anteriorly, 
anterolateral angles truncate; carapace smooth, rounded antero- 
laterally and posterolaterally; cervical groove scarcely distinct even 
on lateral plates; dactylus of raptorial claw with 8 teeth (fig. 3c), 
penultimate smaller than either ultimate or antipenultimate; outer 
