28l 



the female, but it reaches to the distal fourth of the visible part of first article, the lateral 

 teeth are of a somewhat stouter shape and only extend to the middle of first article. The 

 antennular peduncle has a much stouter form, being only 3-times as long as thick, the second 

 and the third article are equal and but a little shorter than the visible part of the first. 

 Carpocerite 4, 3-times as long as wide, scale reaching to the middle of third antennular article 

 and somewhat wider than in the adult individuals. 



In the male the posterior angle of the first abdominal pleura is produced into a subacute 

 tooth, the posterior margin of which bears two small denticles, the anterior angle is also acute; 

 the third and the fourth pleura terminate also in an acute tooth, the anterior angle of the 

 third is acute, that of the fourth rather obtuse ; the second bears a subacute tooth posteriorly, 

 whereas the fifth and the sixth are also acute, especially the fifth. Sixth somite one and a half 

 as wide as long, outer angles of the posterior margin produced into an acute tooth, which 

 is directed slightly outward. 



Telson, in the adult male, 3,44-times as long as the posterior margin is wide, this 

 margin moderately prominent, the outer angles acute, but not projecting at all ; the longer inner 

 spinules extend by half their length beyond the posterior margin. Proportion between the width 

 at base and that of the posterior margin 2,3. Spinules of the upper surface large, those of 

 the anterior pair 0,365 mm. long, those of the posterior 0,38 mm., one-seventh the length of 

 the telson and situated close to the lateral margins; the anterior pair is situated far before the 

 middle, the proportion between the length of the telson and the distance of the anterior pair 

 from the posterior margin being i ,46, the proportion between the distances of both pairs from 

 the posterior margin 1,6. 



In the female the pleura of the first somite are rounded anteriorly, the second are also 

 rounded, the third and the fourth terminate in an acute tooth; the two following are subacute, 

 sixth somite and telson as in the male. 



Merus of large cheliped of the male 2,1 -times as long as wide, upper margin terminating 

 in a small, acute tooth at ape.x, the two other margins with the apices also acute. Relative 

 dimensions of the large chela: fingers i; total length 3,7; height 1,33, this chela being 2,75- 

 times as long as high. Anterior margin of the palm terminating in an obtuse tubercle, that is 

 rounded above. 



Merus of small cheliped 3,2-times as long as wide, the margins unarmed at the apex. 

 Proportion between the length of both chelae 2,4. Relative dimensions of the small chela: 

 fingers i; total length 3,1; height 0,92, this chela 3,36-times longer than high. Dactylus tapering, 

 its outer margin fringed with long stiff setae from the articulation to the tip. 



Merus of second legs 4,6-times as long as wide. Carpus of a stout shape, first segment 

 2,75-times as long as thick at distal extremity, a little shorter than the sum of the four following, 

 the proportion being as 4:5; the second, the third and the fourth are equal, a little wider 

 than long. The length of the chela, the fingers of which are one-fourth longer than the palm, 

 appears intermediate between the length of the first carpal segment and that of the four following 

 taken together. 



Relative dimensions of the third legs nearly as in Syu. bitinguiculatus (Stimpson) Cout., 



149 



