358 CRUSTACEA. 



abdomen which covers at its base the whole breadth of the sternum. 

 The species here referred have a very thick body. The eyes are 

 short. The anterior legs short and rather stout. The orbit is con- 

 tinued at its outer extremity in a broad furrow. The crest or ridge 

 on the third joint of the outer maxillipeds is naked instead of pilose 

 or ciliate ; but we cannot say that this is a generic characteristic. 

 This genus in Edwards's system would fall into Sesarma. 



SARMATIUM CRASSUM. 



Carapax obesus, supra Icevis, lateribus valde arcuatis, fronte fere recto, 

 margine antero-laterali leviter 2-emarginalo, dentibus rotundatls. 

 Pedes antici maris breves, manu supra transversim k-5-plicatd, extus 

 fere Icevi, digito ntobili supra breviter k-subspiiwso, carpo plerumque 

 Icevi, supra paulo seriatim granulato. 



Carapax obese, smooth above, sides much arcuate, front nearly straight, 

 antero-lateral margin faintly two-emarginate, the teeth rounded and 

 slightly projecting. Anterior feet of male short, hand above trans- 

 versely four to five-plicate, externally nearly smooth, moveable 

 finger with four short rudiments of spines, carpus mostly smooth, a 

 few seriate granules above, 



Plate 23, fig. la, male, natural size; b, under view, enlarged four 

 diameters ; c, male abdomen and sternum, enlarged two diameters ; d, 

 hand, enlarged three diameters. 



Upolu, Saraoan Group, Pacific Ocean. 



Length of carapax, six and one-eighth lines ; breadth, seven lines ; 

 thickness of the body, four and one-fourth lines ; length of the front, 

 three lines ; length of the hand, four lines ; length of third joint of 

 posterior legs, three lines; of same joint of penult pair, four lines. 

 This joint is much compressed, and has an acute tooth near apex, as 

 in Sesarma ; it is naked and slightly granulous on part of outer sur- 

 face. Legs not pilose. Epistome granulous. Third joint of outer 

 maxillipeds rather shorter than second. Sides of the carapax around 

 to the mouth reticulated, as in Sesarma ; a triangular space beneath the 



