ii6 



not yet to the middle of the scale, the lamina of which is truncate distally and surpassed by the 

 distal spine; flagellum hairy. External maxillipeds reaching to the tip of the antennal scales. 



The legs of the i=' pair that support a strong spine at the base and another at the 

 ischium, reach to the end of the antennal peduncle; carpus a little longer than the merus and 

 than the chela, fingers one and a half as long as the palm. The legs of the 2°'^ pair reach 

 almost to the tip of the scales, carpus one-third longer than the chela, fingers one and a half 

 as long as the palm. The legs of the 3'^'^ pair reach almost with their whole chela beyond the 

 antennal scales, carpus one and a half as long as the chela, fingers one-fourth longer than the 

 palm. The much shorter legs of the 4'^ pair do not yet reach to the middle of the antennal 

 peduncle, whereas those of the 5"^ extend with their dactyli beyond the tip. 



The thelycum consists 1° of two divergent, flattened plates, that are as long as broad and 

 that unite posteriorly, whereas they are rounded anteriorly, and 2° of a large, flattened, triangular, 

 acuminate plate that reaches to the coxae of the 2°^^ legs, while posteriorly it overhangs the 

 two rounded lobes. There is a small tooth on each of the sternal ridges of the five anterior 

 abdominal somites. 



Remarks. Sicyonia longicauda Rathb. seems to differ by a more slender, more 

 pointed and longer rostrum, by the smaller, less prominent teeth of the dorsal crest, 

 by the 6* abdominal somite being nearly twice as long as the 5'^^ (though in the figure it 

 appears hardly so long) and perhaps still by other differences. 



152. Sicyonia rectirostris de Man. 



J. G. DE Man, in: Notes from the Leyden Museum, Vol. XXIX, 1907, p. 141. 



Stat. 193. September 13/14. Sanana-bay, East coast of Sula Besi. 22 m. Mud. i female. 



This specimen is 21 mm. long, length of the carapace 7,1 mm., rostrum included, and 

 5,25 mm. without it. The rostrum is horizontal, measures about one-third the rest of the 

 tomentose carapace and reaches hardly beyond the i^' joint of the antennular peduncle, extending 

 just beyond the eyes. Being 0,6 mm. broad at its base and 0,275 mm. at the level of the 

 4'^^ rostral tooth, the rostrum appears, in a lateral view, to narrow considerably and 

 to be hardly half as broad distally as at the base. The upper margin is armed 

 with 5 rather low teeth and there is one tooth at the far end of the straight, lower margin. 

 The i^' tooth stands above the anterior border of the carapace, the tip just reaches beyond it; 

 the distances between the following teeth gradually, though slightly, decrease and the distance 

 between the 4"' and the 5"^ tooth, that is somewhat curved downward, is only one-third the 

 distance between the 3"^'^ and the 4"^ Unfortunately the tip of the rostrum and the tooth at 

 the end of the lower margin that runs quite horizontally, are broken off, but the tip is no 

 doubt strongly curved downward as in Sic. bispinosa and other species, projecting less forward 

 than the 5"^ tooth of the upper margin. The lateral carina reaches almost to the tip and runs 

 close to the lower margin, its distance from the latter being hardly one-third the distance 

 between the carina and the upper margin of the 3''* rostral tooth. 



There are two teeth on the dorsal carina of the carapace, that are also rather low, 



116 



