STALK-EYED CRUSTACEA 273 



granulate, internally with an oblique tubercular ridge. 

 Hand tuberculate, its inner surface with a ridge runnincr 

 up from the lower margin to carpal groove ; in front of 

 this are scattered granules. Fixed fingers straight, 

 extremity obliquely truncated, movable finger strongly 

 arcuated, longer than the fixed finger, these meet only at 

 tips when closed. Front broad between orbits. 



Range.— East Coast of America from Cape Cod to 

 Brazil; West Indies, Barbados, Aspinwall, Panama, West 

 Coast of Mexico, California. Common in British Guiana, 

 on the mud flats washed by the sea, or in brackish water 

 among the trees on the seashore, where they live in holes 

 m the mud. They are also found in almost fresh water 

 on the banks of the canals some distance from the sea. 

 I have found them in similar situations in Barbados, 

 where they appear to live in the same way. There are 

 the following difi'erences between these very small crabs 

 as found in Berbice and in Barbados. 



Berbice specimens, male.— Abdomen seven-jointed, 

 tapering rapidly from base to very small terminal segment. 

 Female.— Abdomen wide, oval, with last segment very 

 small and resting on sixth segment. Both male and 

 female are blue-green. 



^ Bardados specimens, male— Abdomen seven-jointed, 

 with sides almost parallel; terminal segment broad! 

 Female.— Abdomen a long oval, with seventh segment 

 very small, and half buried in a notch in centre ofsixth 

 segment. Both male and female are washed with pink. 

 This description is taken from living specimens in these 

 two localities. 



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