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 ; hut 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 vcdde arcimtis, fronte fere recto, 

 margine antero-laterali leiiiter 2-emargirmto, dent thus mtundatts. 

 Pedes ardici maris breves, manu supra transversim <k—5-pUoatd } exhis 

 fere Icevi, digito mobili supra breeder 4:-subsplnoso, carpo plevumque 

 Icevi, supra paido seriatim grevmdedo. 



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, Samoan 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 granulosis 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 



