42 ZOOLOGY OF THE VOYAGE OF H.M.S. SAMARANG. 



Abdomine (maris et feminse) articulis septem. 

 Hab. Insulas Pliilippinas. 



Carapace rounded in front, produced at the latero-anterior angles, and contracted 

 behind, upper surface smooth, marbled with a row of irregular transverse tubercles extending 

 across the postfrontal portion ; latero-anterior margin with five large, prominent, dentiform 

 lobes, the anterior three obtuse, the two posterior acute ; two curved, slightly elevated lines 

 proceeding inwards from the latero-anterior angle. 



Front divided into four lobes, the two inner wide and obtuse, the two outer narrower 

 and more prominent, upper surface slightly concave, outer angle of orbit acute. 



Fore-legs with two strong teeth on the inner and upper part of the fourth joint, the 

 fifth joint slightly granulated externally, coarsely reticulated internally, and with a tubercular 

 ridge at the base ; upper claw unarmed, under claw with five round depressed tubercles. 



Hind-legs transversely rugose, fringed with short, stiff setse. 



Abdomen (both of male and female) seven-jointed, the former fringed with long, the 

 latter with short, setee. 



Hab. Philippine Islands. 



2. PANOPEUS CAYSTEUS, Adams Sf White. (Tab. IX. Fig. 2.) 



Thorace subtrigonali, antice convexo, marginibus rotundatis lineis impressis obsitis ; margine latero- 

 anteriore serratulis tribus subdistantibus. 



Fronte, in medio, emarginata, supra sulcata, angulo externo canthi obtuso. 



Chelis lsevibus, digito superiore arcuato inermi, digito inferiore tuberculis quatuor parvis acutis. 



Abdomine (feminse) articulis septem. 



Hab. Maria Orientalia. 



Carapace subtrigonal, rounded in front and at the sides, surface smooth, marked with 

 faintly impressed lines ; latero-anterior margin with three rather distant sharp serrations. 



Front emarginate in the middle, without lobes, a trifid groove on the upper surface ; 

 outer angle of orbit rather obtuse. 



Fore-legs smooth, upper claw strong, arched, unarmed ; lower claw with three or four 

 small acute tubercles. 



Hind-legs smooth, fringed on the last and penultimate joints with long hairs. 



Abdomen (of female) seven-jointed, the second joint narrower than the rest, fringed with 

 short stiff setse. 



Hab. Eastern Seas. 



3. PANOPEUS FORMIO, Adams Sf White. (Tab. IX. Fig. 1.) 



Thorace latiore quam longiore, lateribus rotundatis, linea valde distincta ab angulo latero-anteriore 

 projecta; margine latero-anteriore lobis quatuor longis rotundatis, dente parvo ad angulum latero-anteriorem. 

 Fronte lobis quinque subobsoletis, supra sulcata, angulo externo canthi fissura parva. 



