CANCROIDEA. 215 



front margin of the arm there is an acute spine, and the carpus is 

 acute on the inner side on the right arm, and subacute on the left 

 arm. The extremity of the tarsus is like that of the Icevissimus. 



An imperfect specimen from the Feejees or Tongatabu, has the 

 lateral teeth of this species, and may be identical with it : see figure 

 35, plate 12, which represents the antero-lateral margin. The carpus 

 is prominent acute at its inner angle, and there is a prominence on the 

 anterior margin of the arm. 



Chlorodius icevissimus. 



C. nigro affinis. Garapax perlmvis, nee ad medium nee versus later a areo- 

 latus, margine antero-laterali k—b-dentato, dentibus Net Tpaulo remotis, 

 E scepe obsolete, S minore, T et 8 obtusis, carapacis latitudine T majore 

 quam latitudo S. Pedes antici longi, pervalidi, Imves, digitis midto 

 hiantibus. Pedes 8 postici paulo pubescentes. 



Near G. niger. Carapax very smooth, not areolate either at middle 

 or towards the sides; antero-lateral margin four to five-toothed, 

 tooth E often obsolete, S smaller than T, T and S obtuse, breadth 

 of carapax across from T to T greater than from S to S. Anterior 

 feet long and very stout, smooth, fingers much gaping. Posterior 

 eight feet somewhat pubescent. 



Plate 12, fig. 4 a, male, enlarged three diameters ; b, extremity of 

 male abdomen, enlarged ; c, female abdomen, enlarged ; d, right hand, 

 enlarged three diameters; e, left, ibid.; /, part of outer maxilliped; g, 

 extremity of tarsus, much enlarged. 



Sandwich Islands. — Probably the same from Tutuila, of the Samoan 

 Group, and from the Straits of Balabac. 



The absence of all areolation, even near the lateral teeth, distin- 

 guishes this species from the niger or cyiherea. Some young speci- 

 mens of the preceding species appear to approach the Imvissimus. But 

 the hands afford another distinctive character, they being very stout, 

 and the fingers less slender and more gaping than in the niger. The 

 specimens are of a pale colour, not even the fingers having a dark 



