2 o 6 CRUSTACEA. 



ratio of length to breadth, 1 : 1*21. The resemblance to the planus is 

 close but the species is much narrower, and the smaller hand is 

 minute tuberculate, instead of smooth, like the larger hand. The 

 finder of the larger hand is smooth and round, and not channeled. 

 The hairs of the eight posterior legs are few and distant, and are 

 mostly confined to the fourth and fifth joints. The tarsus is some- 

 what hirsute on the upper and under side. The moveable finger of 

 the large hand has not a large basal tooth. 



Genus PILUMNUS, Leach. 

 Pilumnus vespertilio (Fabr.), Leach. 

 Straits of Balabac. 



Pilumnus globosus. 



Carapax valde convexus, suborblcidaris, parce transversus, non areolatus, 

 vix granulosus, breviter pubescens, f route ernarginaio ; margine antero- 

 laterali fere integro, dentilus minutis tribm vel guatuor granuli- 

 formibus, isolatls. Pedes antici crassi, inoequi, omnino hlrsutl et 

 minute tubercidatl, tubercidls nidlis serlatls. Pedes 8 postici omnino 

 hirsuti. 



Carapax very convex, suborbicular, sparing^ transverse, not areolate, 

 hardly at all granulous, short pubescent; front emarginate, antero- 

 lateral margin nearly entire, teeth three or four, minute, granuli- 

 form, isolated. Anterior feet very stout, unequal, wholly hirsute 

 and minutely tuberculate, none of the tubercles seriate. Eight 

 posterior feet wholly hirsute. 



Plate 13, fig. 10, female, enlarged three diameters. 



Island of Tahiti ; also Waterland and Baraka, Paumotu Group. 



Length of carapax of a female, live and a half lines; greatest 

 breadth, six and a half lines; ratio of length to breadth, 1 : 12. In 

 a male, length, five lines ; breadth, six lines ; ratio, 1 : 1*2. The out- 



