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the posterior margin projects but little in the middle ; the longer, inner spinules measure two- 

 thirds the width of the posterior margin. As regards the arrangement of the spinules of the 

 upper surface, that are o, 1 6 mm. long, the three specimens do not agree with one another. 

 In the female from Stat. 289 the two anterior spinules either of which is situated almost as 

 far from the lateral margin as from the mid-line, are inserted at the anterior third and the 

 posterior pair is nearly twice as far distant from the posterior margin as from the anterior pair. 

 In the two other specimens the anterior pair is situated a little more backward, its distance 

 from the posterior margin being three-fifths the length of the telson and in both specimens 

 the posterior pair is situated just midway between the posterior margin and the anterior pair. 

 Inner uropod 1,6-times as long as broad. 



Second joint of antennular peduncle one-fourth shorter than the visible part of the first, 

 third joint a little shorter than second; the acute stylocerite that distinctly projects beyond the 

 orbital spines, reaches to the middle or to the distal third of the visible part of first 

 antennular article. 



Lower spine of basicerite small, reaching to or hardly beyond the base of the rostrum 

 proper, upper spine half as long; both spines are sometimes directed outward. Carpocerite 

 hardly longer than the antennular peduncle and of a rather stout shape, appearing 3,2-times 

 as long as broad when measured at the lower side; the rounded tip of the blade reaches to 

 the middle of third antennular article, but the terminal spine of the scaphocerite, the outer 

 margin of which is slightly concave, is not curved inward, extends by one-fifth of its 

 length beyond the tip of the blade and reaches as far forward as the carpocerite. 



The external maxillipeds extend to the end of second antennular article. 



Of the large cheliped of the female the merus is 2,4-times as long as broad, its upper 

 margin ends in a small, acute tooth, the apices of the two lower margins are also acute, though 

 presenting no proper tooth. The lower side of the very short carpus is produced into a long 

 acute tooth and one observes a smaller, acute tooth on the anterior margin of the upper side. 

 Chela a little, viz. one-seventh, longer than the carapace, rostrum included, much resembling 

 that of Syn. consodrifins, 3,17-times as long as high, presenting its greatest height at the 

 proximal third. Fingers a little less than half as long as the chela, the palm about one and a 

 half as long as the fingers, the chela being 2,63-times as long as the fingers and the palm 

 being in proportion to the fingers as i :o,6i. The palm is everywhere rounded, somewhat 

 narrowing distally and bears, as in Syn. cojisobriims, a small, acute tooth at the far end of its 

 inner (upper) face. As regards the shape of the dactylus and of the lower (outer) face of the 

 immobile finger, this species does not differ from Syn. consodriuus, but this is not the case 

 with the upper (inner) side of the immobile finger. The distal lobe, indeed, is much larger, 

 not rounded as in Syn. consobrinus, but produced into an acute tooth which is directed 

 obliquely upward and forward. The distal half of this finger is, moreover, considerably 

 broadened and, as the distal margin of the lobe runs obliquely downward, the 

 immobile finger appears excavate, when the fingers are looked at from the tips. 



Merus of small cheliped somewhat more slender than that of the larger, 3,7-times as 

 long as broad, armed in the same manner; carpus thicker, upper border with an acute tooth; 



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