CANCROIDEA. 



separated, and the posterior limits of the areolets are indistinct. The 

 legs are smooth and shining, not at all granulous. Under the micro- 

 scope, the hand and carpus appear a little corrugate. The apex of 

 the fifth joint of the eight posterior legs has a triangular surface, 

 which is very short hirsute. The first of the four lobes of the antero- 

 lateral margin has a nearly straight outline, and is but faintly sepa- 

 rated from the following, the others are very low triangular. 



XANTHO STTPERBUS. 



Carapax paulo convexus, anticd sed non medio areolatus, areolis ?>M, 

 4M, 5 L, QL fere coalitis et posticel vix circumscriptis, sulcis anterior^- 

 bus villosis ; fronte paulo sinuoso, emarginato ; margine antero-laterali 

 crassd k-dentato, dentibus duobus anticis subrotundatis. Pedes cristati, 

 manu extus subseriatim minutd tuberculatd, supra valde cristatd; 

 pedibus posticis margines densd hirsutis, tarso villoso. 



Carapax but little convex, anteriorly areolate but not at middle, 

 areolets 3 M, 4 M, 5 L, 6 L, almost coalescent and posteriorly hardly 

 circumscribed, anterior sulci villous, front a little sinuous, emar- 

 ginate; antero-lateral margin coarsely four-toothed, two anterior 

 teeth subrotund. Feet cristate; hand externally subseriately small 

 tuberculate, above strongly cristate ; posterior feet with the margins 

 densely hirsute, tarsus villous. 



Plate 8, fig. 5 a, female, natural size ; b, abdomen. 

 From Raraka Island, Paumotu Archipelago. 



Length, thirteen lines; greatest breadth, twenty-one lines; ratio of 

 length to breadth, 1 : 1 6. Colour of carapax, large vermilion 

 blotches neatly shaded on a whitish ground; anterior margin and 

 parts of the antero-lateral bluish purple ; upper margin of joints of 

 legs in part bluish purple, and the rest of the legs clouded with ver- 

 milion and nesh-red ; fingers brownish black. The areolets 1 M and 

 2 M are united, and the anterior margin is abrupt, the furrow or 

 surface just anterior being villous ; but posteriorly the areolet 2 M is 

 lost, and the same is true of 5 L, 6 L, which are in one. 4 L is distinct 

 and prominent; and 2L, 3 L, are united. The outer surface of the 

 hand is imperfectly beaded in lines. The hairs of the legs are yellow. 



