CRUSTACEA. 



182 



only peculiarities of importance. It has the form nearly of some 

 Pilumni yet has no ridge to the pralabial plate, excepting an obsolete 

 one over its posterior half. It is near Halimede of De Haan, but the 

 male abdomen is only five-jointed and the last joint has not the un- 

 usual length seen in De Haan's species. The front, moreover, is not 

 The species is very deeply areolate and not villous. 



so narrow. 



Mem us ornatus. 



Carapax paulo transversus, prof mule areolatus, areolls asperatis pmd> 

 pue in parte anterior e, nee 2 M nee 3 M subdivisd, margine antero 

 laterall 5-Q-dentato, deniibw B, d, E, N, T, S designatis, scabris, 

 orbifd 4 dentibus cireumdatd ; fronte producto, hit lore, bene emarginato, 

 loins margine concavls. B'des antici aspere tid^erculato, manu tuber- 

 cutis asperatis fere oblongis nee acuminati* armatd, dig it is asperatis. 

 Pedes postici pubeseentes, artictdo otio supra spimdoso. 



Carapax slightly transverse, deeply areolate, areolets asperate espe- 

 cially on anterior part of each, neither 2 M nor 3 M subdivided, 

 anterolateral margin five or six-toothed, the teeth being D, d, E, 

 N, T, S, scabrous; orbit with four teeth on its margin, front rather 

 broad, produced, deeply emarginate, lobes with a concave front 

 margin. Anterior feet with rough or asperate tubercles, those of 

 the hand a little oblong, not pointed, fingers asperate. Posterior 

 feet pubescent, third joint spinulous along the upper margin. 



Plate 9, fig. 1 a, male, enlarged two diameters; b, side view, showing 

 relation of orbit and antero-lateral margin ; c, front view of base of 

 outer antenna?,; pouter maxillipeds; e, flagellum of outer antenna?, 

 much enlarged; /, extremity of tarsus; g, one of the pectinated seta? 

 of the tarsus, showing its setules. 



Dredged at Lahaina, Island of Maui, Hawaiian Group. 



Length of carapax, 5*1 lines; greatest breadth, 7 lines; ratio of 

 length to breadth, 1 : 1*37. 



The prominent areolets with an asperate surface, and the promi- 

 nent tubercles of the oblong hand, give the species a peculiarly rough 



