2 oo CRUSTACEA. 



PlLUMNUS LiEVIS. 



P. levimano affinis, latior. Carapax omnino Icevis, nitidus, non areo- 

 lotus convexiusculus ; f route emarginato; margine antero-laterali %-den- 

 tato, dentibus minutis spiniformibus, posteriore minimo, angulo orbitce 

 postico non prominente. Pbdes antici valde incequi, carpo Icevi, non 

 obsolete tuberculato, manu majore omnino Iwvi, minore sjxtrsim hir- 

 sutd, non tuber culatd. Pedes 8 postioi tenues, pernio Mrsuti. 



Near P levimanus, but broader. Carapax smooth and shining, not 

 areolate, rather convex; front emarginate ; an tero- lateral margin 

 three-toothed, the teeth minute and like spines, the posterior much 

 the smallest, outer angle of orbit not raised into a tooth. Anterior 

 feet very unequal, carpus smooth, not even faint tuberculato; larger 

 hand wholly smooth, smaller sparsely hirsute, not at all tubercu- 

 late. Posterior eight feet slender, somewhat hirsute. 



Form very near the P levimanus, but shorter for the breadth. 



Mangsi Islands, Straits of Balabac. 



Length of carapax of a female, 2 1 lines; greatest breadth, 2'95 

 lines; ratio of length to breadth, 1:1*4. The absence of a faint 

 tuberculation, from the carpus of the larger of the anterior feet, and 

 also from the smaller hand, is characteristic of this species. The eight 

 posterior feet are quite slender, and very distinctly hirsute on some of 

 the joints, the hairs being considerably longer than the diameter of 

 the joints. The antero-lateral margin is quite short, and the postero- 

 lateral is nearly longitudinal. 



PlLUMNUS CALCULOSUS. 



Carapax convexiusculus, antice non areolatus, paulo inceqaabilis elpubes- 

 cens; f route emarginato; margine antero-laterali perbrcri, Ulentato, 

 dente postico minimo, ceteris crass iuscul is ; margine orbital i inferiore 

 tridentato. Pedes antici subwqui, carpo tubercid is panels grandibus 



