CANCROIDS A. 289 



parce angulato, integro, margine antero-laterali tenui, paulo reflexo, 

 obsolete 5-lobato. Pedes antici perbreves, manu superne bicarinatd, 

 carinis integris, digito mobili supra bene carinato, Pedes 8 postici 

 nudi, articulo tertio superne obtuso, tarso pedis postici angustd sub- 

 ovato, apicem acuto et wflexo. 



Carapax slightly broader than long, very smooth and shining, front 

 having a slight angle at middle, entire, antero-lateral margin thin, 

 a little reflexed, obsoletely five-lobed. Anterior feet very short, 

 hand bicarinate above, carinae entire, moveable finger with a thin 

 acute carina. Eight posterior feet nude, third joint obtuse above, 

 tarsus of posterior pair narrow subovate, acute at apex and the 

 point bent one side. 



Plate 18, fig. la, male, enlarged two diameters; b, under view of 

 front ; c, hand ; d, summit of inner branch of first maxillipeds ; e, 

 male abdomen. 



Coral reefs of Ovalau, Feejee Archipelago. 



Length of carapax of male, five lines; breadth, five and a half lines; 

 ratio of length to breadth, 1:1-1. The antero-lateral margin appears 

 entire unless closely examined, when slight fissures are observed cut- 

 ting the margin into lobes. The hand has a flat top between the 

 two carinae, and the outer surface, although not costate, is angled 

 along two longitudinal lines. The eyes when thrown back are wholly 

 concealed in the orbits. The medial sternal suture extends very 

 nearly to the third transverse suture, counting from behind. The 

 form of the sternum is orbiculato-cordate. 



SUBFAMILY II. ARENJ3IKSJ. 



GENTJS AKENJ3US. 



Lupce antennis externis, forma carapacis, manu prismaticd affinis. Pala- 

 tum colliculo utrinque non subdivisum. 



Outer antennas, form of carapax, and prismatic hand, same as in 

 Lupa. Palate not divided either side by a longitudinal ridge. 



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