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view, slightly concave; the rostrum, which measures '/^ of the visible part of first antennular 

 article, does not yet reach to the middle of it. Lateral spines as long as the rostrum, rather 

 obtuse at the tips and slightly wider at their base than they are long ; notches between the 

 lateral spines and the rostrum rather narrow, the distance between the tip of the rostrum and 

 that of a lateral spine being distinctly shorter than the width of the lateral spines at their base. 

 The three frontal spines bear a few setae at their tips. In the adult specimen from Stat. 1 64 

 the rostrum is still shorter, measuring only one-third the visible part of first antennular article. 



Antennular peduncle 5 -times and its second article one and a half as long as wide at 

 the distal end of the latter; the visible part of basal article is one and a half as long as the 

 second and the second a little longer than the third. In the typical specimen from Stat. 273 

 the stylocerite reaches just beyond the middle of second article, in the specimen from Stat. 164 

 almost to the middle. 



Carpocerite slender, 5,1— 5,3-times as long as wide in the middle, projecting beyond 

 the antennular peduncle by two-thirds or three-fourths the distal article ; lateral spine of basicerite 

 a little shorter than the stylocerite, though reaching beyond the first antennular article; spine 

 at the upper angle well-developed, measuring one-fourth the length of the lateral. Terminal 

 spine of scaphocerite reaching almost to the tip of antennular peduncle, projecting but for a 

 short distance beyond the scale which is narrow and which extends to the middle of third article ; 

 the terminal spine is separated from the scale until to the distal fourth part of basal article. 



The outer angles of the posterior margin of the 6"^ abdominal somite are produced 

 into an acute, spiniform tooth, which is about as long as the spinules of the upper 

 surface of the telson and dii^cted backward and slightly outward ; at either side of the middle 

 the posterior margin carries another triangular tooth, which is directed straightly backward. 

 Between these two submedian teeth which are half as long as the outer ones, the posterior 

 margin is straight; but those parts of the margin that are situated between the outer and the 

 submedian teeth are arcuate, the submedian teeth being separated from them by a triangular notch. 



The telson closely resembles that of Syn. diiingiiicniatzis, the measurements (Table A) 

 are the same, excepting that in that species the telson appears comparatively somewhat wider 

 at its base; the spinules of the upper surface, 0,35 mm. long, measure also one-eighth the 

 length of the telson. Posterior margin moderately prominent, not semicircular, outer angles 

 acute, but not at all prominent, very small; the median part of the posterior margin is as long 

 as the outer spinules, while the inner spinules reach far beyond it. 



Merus of large cheliped in the adult female from the Jedan Islands just twice as long 

 as wide, in the adult specimen from Stat. 164 the proportion is 2,24; upper margin unarmed 

 at apex, in the young male, long 10 mm. from Stat. 315, the upper margin terminates, however, 

 in a triangular, rather acute tooth. Relative dimensions of the large chela : fingers i ; total length 

 3,77 — 3,8; height 1,39 or 1,38. This chela appears therefore 2,72 — 2,75-times as long as high 

 and the anterior margin of the palm terminates in a small rounded tubercle, which is 

 somewhat flattened above ; in the young specimen from Stat. 3 1 5 this tubercle is rather acute. 



Proportion between the length of the large and that of the small chela 2,7, the latter 

 is just as long as the large chela is high. Merus of small cheliped 3,2 — 3,5-times as long as 



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