!83 



of median article ; visible part of basal article one and a half as long- as the second and about 

 twice as long as the third. Stylocerite characteristic, its basal part, as long as the lateral frontal 

 spines, dilated, the anterior part very slender, spiniform, acuminate, longer than the rostrum, just 

 reaching beyond the middle of the median article, that appears a little viz. one-fourth longer 

 than wide distally. Carpocerite, like in Syu. trispinostis, as long as the antennular peduncle, 

 but of a less slender shape, being 4,5 — 5-times as long as wide in the middle. Lateral spine 

 of basicerite a Httle shorter than basal antennular article, but much longer than the lateral 

 frontal spines ; spine at the upper angle rather large, almost half as long as the lateral. 

 Terminal spine of the scaphocerite as long or hardly longer than the carpocerite, projecting 

 but for a short distance beyond the well-developed, rather broad scale, that almost reaches to 

 the tip of the antennular peduncle. 



The pleura of the 2"'^ — 4'*^ somites of the abdomen terminate in an acute tooth, the 

 tooth at the posterior angle of the pleura of the first somite subacute, pleura of the 5''^ somite 

 also subacute; 6* somite almost twice as wide as long, the median tooth excluded, the posterior 

 margin with a spiniform tooth at the outer angles that is directed outward 

 and with a smaller one in the middle. Unfortunately the posterior margin of the 

 telson is mutilated, so that its width could not be measured exactly; the length of the telson 

 seems to equal, however, about 2,4-times the width of the posterior margin and the proportion 

 between the latter and the width at base seems to be about 1,57. Spinules of the upper surface 

 0,3 mm. long, one-ninth the length of the telson, and implanted near the lateral margins; the 

 anterior pair is placed a little before the middle, the proportion between the length of the telson 

 and the distance of that pair from the posterior margin being 1,7, the proportion between the 

 distances of either pair from that margin 1,66. The outer angles of the posterior margin are 

 spiniform, but probably do not reach beyond the median part. 



Merus of large cheliped twice as long as wide, the strongly curved, upper margin 

 with the apex unarmed, but presenting here, like in Syu. paraneomei'is Cout., a well-marked 

 constriction, which in Syu. trispinostis, at least in the female, is wanting; the infero-external 

 and the infero-internal margin are armed, exactly as in Syu. trispitioszis, with an acute tooth. 

 The relative dimensions of the large chela are: fingers i; total length 4; height 1,33, this 

 chela being just 3-times as long as high. Anterior margin of the palm with a subacute tooth, 

 directed obliquely upward. 



Merus of small cheliped 3-times as long as wide, with the three margins unarmed at 

 apex. Proportion between the length of the two chelae 2,73. The relative dimensions of the 

 small chela are: fingers i; total length 2,45; height 0,77. This chela which is 3,1-tinies as long- 

 as high, appears much less high with regard to its length than the small chela of Syu. 

 trispinosns^ both of the male and of the female of this species. Fingers a little more slender 

 than in Syn. irispinosits, in other respects agreeing with them. 



Merus of second legs 6,4-times as long as wide. First segment of the carpus 5,2-times as 

 long as thick at the distal extremity, one-tenth longer than the sum of the four following; the 

 second, the third and the fourth segment are equal, just as long as thick. Chela scarcely shorter 

 than the sum of the four last segments of the carpus, fingers but a little longer than the palm. 



