137 



Basicerite armed at the infero-external angle with two small, acute spines of equal 

 lengTJi. Carpocerite slender, 5 -times as long as thick and probably about as long as the 

 antennular peduncle. Scaphocerite small, hardly reaching beyond the middle of the carpocerite, 

 semi-elliptical ; its distal extremity is acute, though it does not terminate, as usually, in a tooth, 

 more or less distinct from the scale and the scaphocerite reaches as far forward as the distal 

 end of median antennular article. 



The tfto last joints of the external maxillipeds are missing, tlie long and slender, ante- 

 penultimate joint extends to the apex of the second antennular article. The legs of the first 

 pair are equal, feeble antl resemble those of O. oicu/en/a/is. The short ischium shows a small 

 notch or emargination near the base of the lower margin, Merus slender, unarmed, 5,1 (4,3V 

 times as long as wide, with a few setae on the lower margin. The carpus that gradually 

 thickens towards the distal extremity, is but ver\- little longer than the merus and 5.; (4,2)- 

 times as long as thick at the distal end. The carpus bears some long, fine setae and one 

 observes more numerous, shorter, and feathered setae distally, at the inner side. Chelae small, 

 their length measuring five-sevenths (si-x-sevenths^t of the carpus, they are turned outward, the 

 dactylus being external ; fingers sHghtly gaping, one-third (five-sevenths) longer than the palm, 

 which is almost one and a half as long as broad. The palm is sHghtly wider near the articu- 

 lation of the fingers than proximally and is deeply e m a r g i n a t e along the proximal half 

 of its inner border; there are many short, feathered setae near that emargination. on the lower 

 surface. The fingers, the pointed tips of whicli are crossing one another, show entire cutting- 

 edees that are unarmed and the fincrers bear the usual tufts of setae. 



Ischium of second legs with a small notch at the base of the lower margin. Merus 

 slender, 9 (7,6)-times as long as wide in the middle and appearing at the proximal extremity 

 less broad than in the middle and distally. Carjnis 1,2; (i,32)-times as long as the merus, 

 four-jointed, as in O. otrnA/i/o/isi the segments are 1,34 (0,08) mm., 0,36 (0,3) mm., 

 0.3 (0,22) mm. and 0,54 (0,42) mm. long. The carpus gradually thickens from the proximal to 

 the distal extremity; the first segment, hardly longer than the sum of the three tollowing, is 

 slender, 7 (7)-tin1es as long as thick at its distal extremity, the third is tlie shortest of all, the 

 fourth one and a half as long as the second. Chela just as long as that of the first pair, viz. 

 1,1 (0,76) mm., twice as long as the fourth segment of the carpus; fingers one-fifth (one-third) 

 longer than the palm. 



Ischium of third legs with a movable spine near the middle: merus nearly of the s.une 

 length, 4 (3)-times as long as wide distally and also armed with a movable spine on the lower 

 margin near the truncate, distal extremity. This joint and the two tollowing show these 

 dimensions: merus 1,42 (1,21); carpus i; propodus 0,38 (0,06). Carpus 3 (3")-times as long as 

 thick; propodus compressed, twice (2,2-times) as long as wide at its base, its margins fringed 

 with long, feathered setae that extend beyond the extremity of the dactylus. l)actylus about as 

 long, not shorter (in the other specimen a little shorter) than the propodus, straight and slender, 

 8-times as long as broad, with a few setae at the tip. The ischium, the merus and the carpus 

 are also beset with feathered setae, on the carpus on the upper border only. 



Legs of the fourth pair more slender than those of the third, Merus longer than the 



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