88 H. J. HANSEN. 



Legs, — The last pair (fig. 5 6) are short and slender. The 

 tibia and metatarsus each with one protruding seta, which is 

 nearly longer than the depth of its joint. The tarsus scarcely 

 three and a half times longer than deep, with only two pro- 

 truding setae in the anterior dorsal row, and these settc are 

 considerably longer than the depth of the joint. The anterior 

 claw is moderately robust and considerably longer than the 

 other, which is slender and strongly curved. The first pair 

 are small knobs, scarcely longer than thick, with two mode- 

 rately long setae (fig. 5 c) . 



Cerci (figs. 5d and 5e). — They are conspicuously longer 

 than the last pair of legs, moderately large, scarcely four 

 times longer than deep, and somewhat broader than deep. 

 They are set with a considerable number of seta3, of which 

 'about one third are rather long, often two thirds as long as 

 the depth of the cerci, and protruding in all directions, while 

 the others are much shorter and depressed. The terminal 

 area looks outwards and is exceedingly oblique, so that it is 

 apparently one half shorter when seen from the outer side 

 (fig. 5 d) than its real length, which is seen from above 

 (fig. be); seen from the outer side it seems to be considerably 

 shorter than half of the depth of the cerci. The surface 

 opposite the area is rather short, and has six or seven lines 

 with conspicuous spines; the iipical seta is nearly as long as 

 the area. 



Length. — The adult specimen measures I'G mm. 



Locality. — Island Koh Chang, Gult of Siam, together 

 with S. simplex (Dr. Th. Mortensen). 



Remarks. — This species is distinguished by some ex- 

 cellent chai-acters, the second scutum having the setse short 

 and the processes large and strongly produced, the last pair 

 of legs having very few protruding long dorsal seta;, and the 

 cerci different from those of almost all other species. 



