CRUSTACEA. 
23 
very strong and large ; the fourth joint obtuse, superiorly ; the fifth joint carinated on the 
upper surface. Claws denticulated. Second pair of legs longer than the carapace, the third 
joint cylindrical, without a spine at the end ; the fourth joint slightly compressed ; the fifth 
joint dilated below into a strong spine situated near the apex, surmounted by a tuft of hairs ; 
third and fourth pairs of legs with the third joint slightly keeled, with two spines in the 
middle, the fourth joint carinated : the fifth with a slight tooth tufted with hair ; claws long, 
with the lower edges finely denticulated, and having intermediate setae ; the third joint of the 
fifth pan- with one spine in the middle of the fore-part. 
Abdomen five-jointed, the fourth joint very convex, impressed longitudinally m the 
middle ; the first and second joints with a rounded tubercle in the middle. Adult female. 
Hab. Eastern Seas, Island of Mindoro. 
17. HALIMUS, Latr. 
1. HALIMUS AURI.TUS, Edwards. 
Nulla spin& in margine posteriore thoracis, neque in regione ventriculari. 
Hab. Oceanum Indicum. 
No spine on the posterior border of the carapace, nor on the ventricular region. 
Hab. Indian Ocean. 
Halimus auritus, II (In . Crust. 1. 341 ; Cuv. 11. Anim. (Croch.) t. 2b. f . 3 ; Pisa aurita, Latr. Lnc. 
Meth. 10. 140. 
18. ZEBRIDA, Adams 8f White. 
Thorax depressus, osque longus atque latus. 
From horizontalis, paululum declinata, conficta ex duabus spinis depressis, conicalibus, antice directis 
ad apices paululum divergentibus ; canthis circularibus ; pedunculo oculorum permagno et crasso, latiore 
ab latere ad latus quam de supra deorsum ; cornea oculorum ultra exteriorem frontis marginem protendente, 
fere complente cantliorum hiatus, quorum margines superiores salientes sunt ; marginibus thoracis latero- 
anterioribus uno, valido, depresso processu armatis, conicahbus, acutis, ad basin latis, acicbus exterioribus 
paululum elevatis, cacuminibus prorsum ciuvatis ; priino articulo antennarum exteriorum permagno, longo, 
cylindrico, antennis rostro tectis ; epistomate ei Acanthonycis similliuio. 
Chela breviores iis Acanthonycis, spinis depressis, conicalibus, subobtusis armatse ; brachio triangulari, 
spinst conicali exteriore et interiore ; exteriorc perlonga, sursuin et prorsum directa ; carpo tribus spinis 
armato; una superiore, posteriore prorsum directa; duabus anterioribus lateralibus extrorsum directis, 
ad extremitates rotundatis ; manu spina acuta, depressa cristate. 
Pedes posteriores breves, crassi, admodum compressi ; tertio articulo duabus magnis, depressis, conicis 
spinis in fronte, prorsum directis ; quarto articulo uno depresso, spinoso processu in parte anteriore ; quinto 
articulo ampliata et postice instructo spina acuta, depress^, curvata, retrorsum directa. 
Carapace flattened, about as broad as long. Eront horizontal, slightly bent down, 
formed of two flattened spines, conical, directed forwards, and slightly diverging at their tips. 
The orbits circular ; the peduncle of the eyes very large and thick, broader from side to side 
