280 



CRUSTACEA. 



tato, dentlbus aeutis, subcequis, derde 6to minimo; margins orbitali 

 inferiore i-lobato. Pedes antici breves, mami non armatd, brachio 

 antice 3-spinoso, spina mediand majore. Pedes sex proximi gracillimi 

 nudi, tarso longissimo. Pedes postiei brev lores, tarso oblongo, eUiptico 

 apice breviter wni-spinoso. 



Carapax transverse, not areolate, smooth, granulate, nude; front 

 entire, slightly emarginate at middle, anterolateral margin seven- 

 toothed, teeth acute, subequal, fifth tooth much smaller than the 

 others; inferior orbital margin unequally four-crenate. Anterior 

 feet short, hand without spines, arm with three spines on the ante- 

 rior margin, the middle spine longest. Next six feet very slender 

 nude, tarsus very long. Posterior feet shorter, tarsus oblong 

 elliptic, with a short spine at apex. 



Plate 17, fig. 4 a, male, enlarged four diameters; b, under view of 

 part of front, showing base of outer antenna 4 , and outline of orbit 

 below; c, outer maxilliped; d, male abdomen; e, arm, under view, 

 separated from following joints. 



Paumotu Archipelago ? 



Length of carapax, two and one-fourth lines; breadth, three and a 

 half lines; ratio of length to breadth, 1 > 1*5. The carapax has a 

 short arcuate line on its surface near each posterior tooth, but is other- 

 wise nearly smooth. The specimen may be young, yet has characters 

 that separate it widely from other .genera. 



Genus THALAMITA, Latrcilh, lh lL,«n. 



Carapax latus, /route longiore qwem sem'datitudo carapacis, margins 

 antero-laterali hngitudlnalL Artkidw antenna external lmm pr<& 



longus, artieulo sequente orb'ttd remotlsslmo, 



Carapax broad, front longer than half the breadth of carapax. antero- 

 lateral margin longitudinal. First joint of outer antenna} very 

 long, and following joint inserted far from orbit. 



The old genus Thalamita, is divided by De Haan into Oceanus (for 



