GRAPSOIDEA. 353 



Subfamily II. SESARMINiE. 



Genus SESARMA, Say. 



1. Margo antero-lateralis emarginatus. 



Sesarma bidens {Be Roan) . 



Feejee, or Friendly Islands. 



Length of carapax of a male, ten lines ; breadth in front, twelve 

 lines. The breadth diminishes slightly posteriorly. The surface is 

 shining, and there are some interrupted transverse lines on the cara- 

 pax anteriorly. The upper finger is obtuse and crenulate above ; the 

 hand is very short at its upper inner edge, and this edge rises into 

 two dentations, which dentations are continued upon the surface out- 

 ward in a raised line, which is surmounted by a minute pectinate crest 

 of a dark or horn-like colour. The hand is scattered granulous ; the 

 carpus is also granulous, but the granules are partly in short lines. 

 The third joint of the eight posterior legs is very broad, and the fifth 

 joint has a few tufts of short stiff hairs about its margins, besides a 

 very short ciliation of the upper margin, which extends also a short 

 distance upon the fourth joint. The greatest breadth of the male 

 abdomen is less than twice the breadth of the penult joint. 



2. Margo antero-lateralis integer, 



Sesarma angustipes. 



Carapax quadratus, postice parce latior, granulatus, non nitidus, regione 

 postero-laterali leviter Uneolatd, margine antero-laterali integro, late- 

 ribus bene niarginatis, fronte perpendiadari, supra 4:-lobato, margine 

 frontali medio vix excavato. Epistoma granulatum. Pedes antici 

 subwqui, carpo rnanu digitoque superiore granulatis, granulis nun- 

 quam seriatis, manu supernS Integra. Pedes 8 postici angusti,fere 



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