229 



Straight, converging postero-lateral borders three lobes, separated by minute notches, 

 and granulate more strongly than the rest of the carapace, mark the level, at which the 

 carapace attains its greatest breadth, which is only about 1.25 times the length. The posterior 

 margin is straight, somewhat concave in the middle-third. 



The antennulae are remarkably small, closely folded beneath the front and almost 

 longitudinally directed, as is usual in the genus. The antennae are likewise small ; the flagellum 

 consists of 7 joints, nearly hairless, the last one tipped by one or two long hairs, and the 

 whole flagellum is not longer than the two last joints of the peduncle, which joints are 

 of equal length and provided with several very long, feathered hairs along 

 their margins^). An epistome is not developed, the merus of the external maxillipeds 

 nearly touching the bases of the antennae, but owing; to the presence of strong endostome 

 ridges the anterior margin of the buccal cavity is thickened in the middle and projects backward. 

 The lateral walls of the buccal cavity are divergent backward, not convergent as depicted by 

 BoRRAD.\iLE. The external maxillipeds are well figured by this author (fig. 59^), though I should 

 say, that the ischium is in reality somewhat longer; between them only a narrow linear space 

 is left and so the maxillipeds are exactly parallel, the surface of the ischium is smooth, its 

 lateral margins are perfectly parallel, and the anterior margin is markedly concave; the merus 

 is nearly circular in outline, with the outer and anterior margin much rounded, its surface is 

 granulate ; the carpus is, as usual, inserted at the antero-internal angle of the merus, very 

 short, like the two following joints, so that the whole palp of the maxilHped is scarcely 

 visible in the normal position ; the exognath is very slender and only one-fifth of the breadth 

 of the ischium. 



The chelipeds are equal, strongly granulate. Arm short, much hairy along the margins 

 and at the under surface, upper border with a subdistal notch, marking off a short, conical 

 tooth. Wrist small, not toothed at inner angle, upper surface with pearly granules. Still larger 

 are these granules on the outer surface of the chela, where they are placed in indistinct 

 longitudinal rows (which arrangement is not clearly shown in Borradaile's figure 59<5); on the 

 inner surface of the palm the granules are fine and closely grouped in the middle ; the fingers, 

 which are about as long as the palm are hooked at the tip, roughly crenulate at opposite 

 margins, and longitudinally grooved at outer surface, the grooves being separated by continuous 

 or finely granulate ridges. 



The walking legs are short, the penultimate pair of legs being scarcely lY^ times the 

 length of the carapace. Mero-, carpo- and propodite, especially the former, are heavily fringed 

 with feathered hairs, and, like the carapace, they are granulate at upper surface. The propodite 

 is much broadened, but still longer than broad, even in the last pair of legs 

 (fig. 7, a). Dactyli somewhat compressed, those of the first to third pair subequal, curved, those 

 of last pair shorter, styhform, nearly wholly straight. 



Abdomen of cT (fig. 3^) with the first segment very broad and occupying the whole 

 interspace between the posterior pair of legs, not diminishing in height laterally, 



I) In Borradaile's specimen the flagellum of the antennae seems to be broken off. 



81 



SIBOGA-EXPEDITIE XXXIX f'. 3° 



