244 STALK-EYED CRUSTACEA 



the antennas. Eye-peduncles of moderate size and thick- 

 ness ; they do not nearly fill the orbital cavities. The 

 basal antennal joint is short and somewhat dilated, and 

 does not usually quite reach the frontal margin ; the 

 flagellum is very short. Theendostome is without distinct 

 longitudinal ridges. The external maxillipedes do not 

 meet along their inner margins, but enclose a lozenge- 

 shaped interspace ; the third and fourth joints are rather 

 broad and truncated ; the fourth even rather concave at 

 its distal extremity ; the fifth joint articulates with the 

 fourth at its antero-external angle. 



The first pair of legs usually unequal, the larger one 

 sometimes enormously developed ; the fourth joint is 

 more or less trigonous ; the fifth usually with a spine on 

 its inner margin ; palm often shorter than the fingers, 

 which are more or less distinctly dentate on their inner 

 margins. 



Walking legs robust and more or less elongated ; 

 the fourth joint with the superior margins acute, and 

 armed with a subterminal spine. The last joint is armed 

 with spines in a longitudinal series. Abdomen seven- 

 jointed in both sexes. 



Range — A land-crab found in tropical and subtropical 

 countries in both hemispheres. 



Synopsis of the Species. 



A. Antero-lateral marginal line on maximum trans- 

 verse curve of antero-lateral border of carapace. 



a. Fourth joint of first pair of legs, and palm of hand, 

 smooth. — (C. cami/ex.) 



b. Fourth joint of first pair of legs with spines ; palm 

 of hand granulated. — {C. armatuni^ 



B, Antero-lateral marginal line does not indicate 



