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 seta? ; the third joint of the 

 fifth pair with one spine in the middle of the fore-part. 



Abdomen five-jointed, the fourth joint very convex, impressed longitudinally in 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 ATJRITUS, Edwards. 



Nulla spina, 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 aurifots, Edw. Crust. 1. 341; Cuv. E.. Anirn. (Croch.) t. 28. f. 3; Pisa aurita, Latr. Enc. 

 Meth. 10. 140. 



18. ZEBR1DA, Adams 8f White. 



Thorax depressus, seque longus atque latus. 



Frons horizontals, paululum declinata, conficta ex duabus spinis depressis, conicalibus, antice directis 

 ad apices paululum divergentibus ; can this circularibus ; pedunculo oculorum permagno et crasso, latiore 

 ab latere ad latus quam de supra deorsum ; cornea oculorum ultra exteriorem frontis marginem protendente, 

 fere complente canthorum hiatus, quorum margines superiores salientes sunt ; marginibus thoracis latero- 

 anterioribus uno, valido, depresso processu armatis, conicalibus, acutis, ad basin latis, aciebus exterioribus 

 paululum elevatis, cacumrnibus prorsum curvatis ; prhno articulo antennarum exteriorum permagno, longo, 

 cylindrico, antennis rostro tectis ; epistomate ei Acanthonycis simillimo. 



Chela breviores iis Acanthonycis, spinis depressis, conicalibus, subobtusis armatse ; brachio triangulari, 

 spina conicah exteriore et interiore; exteriore perlonga, sursum et prorsum directa; carpo tribus spinis 

 armato; una superiore, posteriore prorsum directa; duabus anterioribus lateralibus extrorsum directis, 

 ad extremitates rotundatis ; manu spina acuta, depresso, cristata. 



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, depressa, curvata, retrorsum directa. 



Carapace flattened, about as broad as long. Front 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 



