24 CRABS FROM THE INDIAN OCEAN— M. J. EATHBUN. vol. xvii. 



female lias the first two segments short, the third to the sixth iucreasiug 

 successively iu length, the terminal segment large, subtriangular, one- 

 half as long as wide. Eggs very large, 3^ mm. in diameter. The disposi- 

 tion of the antennal region is similar to that of J), imifatrix. The auten- 

 nie are minute, smaller than in that species, and smaller than the anten- 

 nulfE. Maxillipeds similar in shape to those of I), imitatrlr ; margin 

 of merus and anterior margin of ischium tuberculous. 



The chelipeds are very unequal and rough with transverse squamose 

 lines. The lower and inner margins of ischium and merus are armed 

 with triangular spines ; the upper margin of the merus, with teeth which 

 are prolongations of the rugosities of the outer surface. The carpus 

 has a stout inner spine, with a smaller one at its base. The larger 

 hand is deep and swollen ; both hands are curved inward and very lough, 

 especially above. Digits with impressed longitudinal lines; very stout 

 in the large cheliped; iirehensile edges irregularly toothed and almost 

 touching. The ambulatory legs are longer than in D. imitatrix. Joints 

 margined, and with transverse rugose lines which form shallow teeth 

 at the ui)per margin. Carpal and propodal joints with a double margin 

 above, and two more or less rough longitudinal ridges on the outer sur- 

 face. Propodal joints with two rows of small appressed spines below. 

 Dactyli flattened, longer and narrower than in I), imitatrix, with two 

 rows of sharp spines above and beh^w. 



Measurements. — Length of carapace (of female), 20 mm.; width, 34; 

 thickness, 18; width of front, 12; width between postorbital spines, 

 22.5; width between epibranchial spines, 27; length of propodal joint 

 of cheliped, lower margin, 27; depth, 13.5; thickness, 8.8. 



Localitii. — Seychelles. (Two females, one with eggs; one young, Ko. 

 180G4). 



This si^ecies difiers from Declenia imitatrix from Zanzibar in the ijost- 

 frontal crest, narrower front, rough surface, fewer spines on the carpus, 

 and in so many other respects that the species are not likely to be con- 

 found e'l. 



