224 CRUSTACEA. 



are very prominent, and broken much as in Chlorodius monticulosus. 

 The abdomen has the last segment triangular, and a little oblong; the 

 third joint abruptly broader than either the second or fourth, and on 

 either side triangular. 



CYCLODIUS GRACILIS. 



C. ornato aspectu areolisque similis, parce latior, dentibus antero-late- 

 ralibus tribus posticis tenuioribus et bene acutis, areolis vix compositis, 

 2M subdivisd, BM vix tripartitd. Pedes armati, 8 posticis paulo 

 pubescentibus, manu seriatim spimdosd, digitis spinulosis. 



Near ornatus in appearance and areolation, but sparingly broader, three 

 posterior antero-lateral teeth more slender and neatly acute, areolets 

 hardly compound, 2 M subdivided, 3 M scarcely tripartite. Feet 

 armed, eight posterior a little pubescent, hand seriately spinulous, 

 fingers spinulous. 



Plate 12, fig. 12 a, animal, enlarged three diameters; b, leg of pos- 

 terior pair, enlarged. 



From Tutuila, Samoan Group, Pacific. 



Length of carapax, three lines; greatest breadth, four lines; ratio 

 of length to breadth, 1 : 1'33. 



The abdomen and hands in this species, are the same very nearly 

 as in the ornatus (see figures /and g of that species). The posterior 

 legs are also similar ; yet the spinules appear to be a little more pro- 

 minent. It is possible that this may be only a variety of the ornatus. 



GENUS CYMO, De ffaan. 



The species of Cymo have a very peculiar aspect, the body being 

 flattened, and approaching orbicular in outline, and the larger hand 

 rather long, with very stout fingers, the upper much curved. The 

 front margin is equal to half the whole breadth of the carapax, and 

 there is no point of separation between the antero-lateral and postero- 



