38 PROCEEDINGS OF THE NATIONAL MUSEUM VOL, 125 
DistTRIBUTION.—Northern Indian Ocean. It was recorded from 
Karachi by Kemp (1913) but is known from no other localities in the 
Arabian Sea. 
Oratosquilla Manning, 19638 
Diaenosis.—Eye large, cornea bilobed, noticeably broader than 
stalk; ocular scales separate; carapace rounded posterolaterally ; mandi- 
bular palp usually present; 4 epipods present; dactylus of raptorial 
claw with 5 or more teeth (usually 6), upper margin of propodus pecti- 
nate; lateral processes of fifth, sixth, and seventh thoracic somites 
bilobed; abdomen with paired submedian, intermediate, and lateral 
carinae; telson with fixed apices on submedian teeth; basal prolonga- 
tion of uropod with at most serrations or tubercles on inner margin. 
TyprE-spEcies.—Squilla oratoria de Haan, 1844. 
Discussion.—Nine species of Oratosquilla have been recorded from 
the northwestern Indian Ocean; three of these are recorded herein 
from West Pakistan. The other species which are known from the 
general area are: (1) O. quinquedentata (Brooks, 1886), reported 
from Bombay by Kemp (1913); (2) O. investigatoris (Lloyd, 1907), 
reported from the Persian Gulf by Kemp (1913) and the South 
Arabian coast by Chopra (1939); (8) O. gonypetes (Kemp, 1911), 
recorded from the Persian Gulf by Kemp (1913) and the Gulf of 
Oman by Chopra (1939); (4) O. perpensa (Kemp, 1911), reported 
from the Persian Gulf by Kemp (1913); (5) O. massavensis (Kossmann, 
1880) from the Red Sea (records summarized by Holthuis, 1967b); 
and (6) O. simulans (Holthuis, 1967) from the Red Sea. 
Kemp (1913) also reported 0. woodmasoni (Kemp) and O. massa- 
vensts from localities in the western Indian Ocean; those specimens 
are probably referable to O. hesperia (Manning) (see below). 
All three of the species discussed below are extremely abundant 
in the waters off West Pakistan; most of the specimens were obtained 
at the local fish market in Karachi. 
Key to Oratosquilla from West Pakistan 
1. Median carina of carapace distinct throughout its length, bifurcation open 
posterior to dorsal pit; anterior lobe of lateral process of sixth thoracic 
somite with apex truncate 9.0. 2): Si. sh es O. nepa 
Median carina of carapace either interrupted or indistinct anteriorly; anterior 
bifurcation, if present, open anterior to dorsal pit; anterior lobe of lateral 
process of sixth thoracic somite with apex acute .......... 2 
2. Anterior width of carapace less than one-half median length; lobe on outer 
margin of inner spine of basal prolongation of uropod rounded, margin 
CONVER: ha, Bert MT Ay ae US io Bebe See a on O. interrupta 
Anterior width of carapace more than half median length; lobe on outer 
margin of inner spine of basal prolongation of uropod sharp, acute, margin 
CONCAVE a) ei Fake Be eke fariond tg ole esoaltss eH gots ad Pa Oe O. hesperia 
